Sunny Sunday Smiles, or, You are My Sunshine, My Only Sunshine

by SedaCassie

Upon discovering Rin and Len's forbidden love, Miku is talked into helping them hide their affair. But as time goes by, she finds that she cannot stop thinking about what they have, and they find themselves intrigued by the idea of inviting Miku to join them. She can't say that she's necessarily opposed to the idea.

A Rainy Discovery

Note: This is a fan sequel to a Rin/Len story called Rainy Saturday Reminisces. I always enjoyed that story, and wished that there was a Rin/Len/Miku story that was written with the same level of care. But since there wasn't one, I decided to just do it myself. And since I realized that I would be basically copying the original story's formula, I might as well just own it and make it a fan sequel.

Unfortunately, RSR's author has left the fanfiction community entirely, and it only exists in orphaned form on Archive of Our Own, which you should be able to find using the tags. I reached out to the author the best I could to try to ask for permission, but they never responded, if they even got my message at all. If they catch wind of this and want me to take it down, I'll of course be happy to do so. But until then, I hope you enjoy a healthy helping of Vocaloid smut!

…

A sliver of morning light shines in from beneath the hotel room's curtains to hit directly in my face, pulling me from a deep sleep. I groan in irritation, my face twisting up as I fight to remain in the warm embrace of slumber. But it is a losing battle, and I soon find my eyes opening in response to the glare.

As soon as they do, I find myself strangely grateful for the premature wake-up call, as they are greeted by the enchanting sight of a lovely young girl's face, framed by the golden curls of her unkempt hair. Her eyes are closed, her cherubic face totally relaxed in sleep.

The blanket we both share is disturbed by my rousing, causing it to slip away from the girl's bare shoulders. Confined within its comforting embrace, the girl's slim body feels so warm and soft as she molds herself against my own, my arms still loosely wrapped around her waist. Like myself, the girl wears no clothes, allowing me to feel every sweet curve. She slowly breathes in and out, every exhale tickling the skin of my lips.

But hers was not the only one I am sharing warmth with. To my back is another form, this one harder and more masculine, though honestly not by a whole lot (though you'd never catch me telling him that to his face). The pretty boy has fallen asleep with his body curved against mine, with one arm draping over my hip to lay upon his sister's rear. His face nuzzles the back of my neck, every soft breath sending tingles down my spine.

I slowly breathe out as well, gently so as not to wake the girl. Memories start to flood back into my sleep-addled mind, memories of the night before and all that we did. Following close behind was a deep shame. How could I have defiled these two sweet, innocent children? How could I have allowed myself to participate in such shameless debauchery? If anyone ever found out, it would ruin all of us.

Then the girl's eyes open, and I find myself staring into twin pools of the purest blue framed in honey gold, so sweet and so warm that they just about took my breath away.

It is a bewitching sight, and I might have allowed myself to get lost in it, but the girl's eyes slide closed only a second later, and the spell is broken. She sleepily murmurs and shuffles around under the blanket, burrowing herself in deeper and snuggling in closer to me, so that her head curves in right under my chin. I let out a sigh and gently stroke her back.

It is hard to feel bad when the results feel just so darned good. Maybe what we did together wasn't the right thing. But was it really so wrong to share such love and affection?

Regardless, what was done was done. We made our bed and literally slept in it. And now, here I am, sandwiched in between the twins. My twins. Rin and Len Kagamine, the twin darlings of our little idol unit, paragons of sweetness and innocence, though in truth they were only one of those things. And they are mine…

…

It's hard to say exactly when it was that I noticed that something was just…off about the youngest members of our little family. Certainly, Rin and Len had always been extremely close to one another, but that was to be expected. They had the bonds of brother and sister between them, after all. And not only that, they were twins, having been together literally since conception. As such, despite being the opposite sex, they looked so much alike that a change in hairstyle and wardrobe could easily pass one off as the other.

So, no, their closeness did not ring any alarm bells. They never acted in any inappropriate way toward one another, they slept in separate rooms, and simply behaved as any normal brother and sister would, albeit a brother and sister who were also world-famous pop idols. The only sign that anything unusual was going on was that they continued their practice of bathing together long after when most children would become uncomfortable with sharing a bath with their sibling. And yes, their bathing times had been growing unusually long as of late, but that alone wasn't enough to draw suspicion. And we certainly could never have anticipated anything like this!

But to be truthful, the real reason that I suppose the rest of us were blind to what was going on between those two was that we couldn't see them as anything other than innocent children. It was the core part of their appeal, after all. Meiko and Kaito were the mature ones, Luka was (no matter how much she denied it) the sexy one, and they were the cute ones. So of course they wouldn't be concerned with matters such as sexuality or romance. Why would they be? They were Rin and Len Kagamine, everyone's kid sister and brother!

Which wasn't to say the entire concept was alien to them. They certainly both had their fair share of admirers, to the point where management had to carefully vet any letters and gifts that they were sent so as not to expose them to anything inappropriate. But that was to be expected! They were celebrity idols, after all! I certainly have had my fair share of propositions and gifts, from both male and female admirers. It was just something we had to deal with.

Though come to think of it, though neither of them had ever expressed any interest in any of their many swooning fans, some of Len's songs did tend to be a little on the sultry side. I remember growing concerned after "SPICE!" had become a hit and asking him about that. He had laughed and brushed off my worries, saying that he had been getting annoyed with the constant attention from his fangirls and had written that song to mess with them. I had accepted this explanation at the time, though Luka hadn't been convinced. Maybe I should have listened to her.

But even so, I had to give the two of them credit. They were good at hiding the scandalous nature of their relationship. After all, I only found out completely by accident.

By sheer coincidence, a long-planned vacation for Luka and I just so happened to coincide with a business trip Meiko and Kaito needed to make to Sapporo, which meant that the twins would have to be alone for the weekend. Meiko had been concerned about leaving the two of them to mind the house, but I had assured her that there was nothing to be worried about. After all, I was only a couple years older than they, and here I was heading out on a long vacation. They surely could handle the house on their own.

So it was decided. The elder members of our household would all head out to where we needed to go, and Rin and Len would be left to take care of the house.

That was where things got a little dicey. This isn't widely known, but Luka suffers from frequent bouts of insomnia, and uses some pretty strong sleeping pills. All of it is fully prescribed and on the level, and she is, of course, very responsible with their use, but in the chaos of packing and making sure that the twins would be okay, she somehow forgot her pills, something that neither of us noticed until that first night when we unpacked in our hotel room.

"Damn it!" she swore, her frustration breaking through her customary demure demeanor. "Damn it! Out of all the things!"

"If you want, I can head back," I volunteered. "It's only a thirty minute drive."

"I-" She glanced over to the clock, and her face fell. "No, that'll take an hour, and it's already late. There's a convenience store down the road. I'll just check if they have something."

Unfortunately, the convenience store's pharmacy was already closed for the night, and what they had over the counter proved ineffective, resulting in a long and sleepless night for Luka.

"Look, just let me head home," I told her the next day. "It'll only take an hour to get there and back. I'll be back before you know it."

"How? You don't even have your permit!"

I shrugged. "I'll get a cab."

Exhausted and disheveled, Luka breathed out a defeated sigh. "No, I'll go. I'm-"

"Tired, should not be driving, and you really need a nap." I poked her in the chest, pushing her back onto the bed. "Go. Sleep. I'll be fine."

"All right," Luka said at last. "But be careful. The weather's pretty bad."

I called the twins as I was heading out, but neither of them answered. That was odd. Usually, they weren't further than a meter or two from their phones. Maybe they were practicing at the studio or too engrossed by some video game to notice. At any rate, I sent them a text and hoped that they would get it.

Luka was right about the weather. It was raining hard when the cab pulled away from the hotel, and even harder once we hit the highway. My half-an-hour trip ended up taking more around forty-five minutes. The whole time, I kept checking my phone, wondering why the twins weren't responding to my texts or calls.

They still hadn't responded by the time that the cab dropped me off in front of the house, and I was growing irritated. Was it really so difficult to check their phones every once in a while? With a sigh, I unlocked the door and entered the house.

"Hello, it's me!" I announced as I slipped out of my shoes and looked around. "Hello?"

To my surprise, the place was spotless. Not that Rin and Len were especially messy, but I wasn't counting on them to have given the place a thorough cleaning. Even the couch cushions looked like they had been recently washed.

"Guys?" I said as I stepped inside and shut the door. "Rin? Len? Anyone home?"

No answer. Maybe they had gone out. But if that was the case, why hadn't they noticed the missed calls and messages on their phones? It wasn't as if they would leave them behind.

Sure enough, I found both of their phones sitting on the kitchen counter, both displaying notifications of my attempts to reach them. I frowned. Now, where could they be?

"Hello?" I said again to the seemingly empty house. "Is anyone-"

And then I heard it. Coming from upstairs was the strangest noise, a sort of rhythmic squeaking, punctuated by strangled-sounding grunts and high-pitched gasps.

What in the world was that? Were they watching a movie? If so, why weren't they using the communal television?

Bewildered, I ascended the stairs to the second story. There, the door to Len's room was shut tight, but Rin's was open. It was from her room that the noise was emanating from.

You'd think at this point I would have put two and two together. The noise was obviously of two people having sex, so even if I never even entertained the possibility of incest than I should have at least realized that one of them had a "friend" over, or maybe was just watching porn. But again, you have to realize that the idea of either of them even being interested in sex was still alien to me.

But even if I had already accepted the idea of my cute little kouhais being interested in sex, and even if I had known that they already had an active sex life, absolutely nothing would have prepared me for the sight of Rin lying flat on her back, wearing nothing save for her woolen knee-high socks and hairclips, one hand clamped over her mouth while the other seized onto the surface of her bedsheet, eyes screwed shut as she squeaked and whimpered in ecstasy.

Her legs were thrown up over the shoulders of her twin brother, who was even more naked than she was. He was hovering over her, one hand braced against the bedframe, the other reaching down to grope one of her tender breasts, his hips bucking against…against…

Oh my God, they were having sex! Len was literally fucking his sister right before my eyes!

I had no idea how long they had been at it, but clearly they were so preoccupied with the act of literal incest that they hadn't heard me come in. Come to think of it, that was probably why they hadn't heard my calls or seen my texts, either!

What was I supposed to do? Leave and pretend that I had seen nothing? Demand an explanation? Scream? There literally was no appropriate response to the utterly obscene display taking place before me. It was as if my mind had been so overwhelmed by shock and bewilderment that it just shut down completely, leaving me unable to do anything other than stand and stare.

It seemed as if they were both reaching climax. Rin's back arched as a strangled scream pushed through between her fingers, while Len stopped thrusting and just pushed into his sister, letting out a raspy groan.

And then the two of them relaxed. I experienced a very odd moment when I noted that in something so incredibly wrong as this, they were still in perfect harmony, with both of their bodies going slack at almost the exact same time.

Her eyes still closed, Rin let out a happy giggle while Len shook his head and chuckled. He pulled back, and I was treated to the absolutely filthy sight of his now limp penis withdrawing from Rin's thighs, milky white cum dripping from the tip.

Len leaned in to give his sister a soft kiss, and I swear to God, that was what did it for me. Somehow, watching two fourteen-year-old siblings have sex before my literal eyes hadn't gotten so much as a peep out of me, but having them kiss was what finally kickstarted my brain enough to finally must up a response, though it wasn't much of one.

"Wha…" I squeaked. That was it. Not even a full word. Just a single, half-strangled exclamation of confusion.

But it was enough.

Len's head snapped toward me, and his blue eyes went as wide as saucer plates while his mouth dropped open in horror. Rin saw me and screamed as she jolted up, though that invertedly caused her forehead to smack against Len's jaw, causing them to both fall back in pain.

"M-M-Miku-nee?" Rin gawked as she gingerly rubbed her head.

I didn't respond. And really, what could one say in that situation? Hi, home early, sorry for the surprise, check your phones more often next time? Boy, you two really take self-love to its most literal extreme? Hey Len, nice cock? Really, there was absolutely nothing I could say that wouldn't make things so much worse.

So all I could say was a small, "Please pardon the intrusion," before I turned and walked away.

"Miku-nee, wait!" I heard Len cry, followed by the sounds of him and his sister scrambling to untangle themselves from one another and rush after me. I didn't answer, I didn't turn, I didn't even slow down. If anything, I sped up my gait, power-walking down the hall until I reached my room.

"Please, listen!" Rin called out from behind me. The two of them were now running toward me. I swiftly opened the door to my room, slipped inside, and shut it tight. A turn of the lock ensured that whatever in the world I had just witnessed could not follow me further.

Immediately, the doorhandle started jiggling as the twins tried in vain to enter the room. This was followed by a frenzied pounding at the door. "Miku-nee, please!" Rin begged. "It's…It's not what you think!"

"Well, it kind of is," her brother mumbled.

"Shut! Up! Len!" The doorhandle shook again. "Miku-nee, we can explain! Just talk to us! Please!"

I probably should talk to them. I wasn't sure how something like this could be explained, but it really was something that ought to be discussed before any decisions were made. There might even be some kind of reasonable explanation.

Instead, I just walked over to my bed, climbed on top of it, and sat down in the corner against the wall, legs drawn up and chin resting against my knees. This couldn't be happening. It had to be a bad dream. That's right. I had fallen on the ride back, and now my twisted subconscious had decided to play the cruelest prank on me. There was no chance in heck that I had just seen Rin and Len fu...having...doing that!

Then, by sheer happenstance, my eyes glanced up.

There, on the wall, was a framed promotional poster of the collaborative Magical Summertime Resort album we had all worked on together and would be promoting in a big show in a few months, the one whose cover art had us all on a beach wearing swimsuits.

That had been a fun shoot, especially since it had coupled with an actual beach day. I hadn't thought much of it at the time. I mean, I was vaguely aware that there were those who would appreciate how much more skin than usual we had been displaying, but that had seemed like such a silly thing to get preoccupied with. It was a summer-themed album! Of course we would be wearing swimsuits!

However, my eye was drawn over Rin and Len, who were at the far right of the poster. Len had on a pair of black and gold board shorts while Rin had on a cute little yellow two-piece, and the pair were hugging one another while grinning and waving at the camera.

It was a perfectly innocent pose for a brother and sister, but now, knowing what I now knew, it struck me as the single most perverse thing imaginable. Had they been engaged in this incestuous affair even then? Had they been sneaking off between shoots to fondle one another on the dunes?

"Come on, Miku-nee!" Len begged. "Just talk to us, okay?"

Whimpering, I snatched up a pillow and shoved it down over my head to cover my ears.

…

I can't move much beneath the bedcovers without disturbing the rest of the two beautiful twins that I fell asleep sandwiched in between, so I settle for burrowing in deeper into their mutual embrace. My arms tighten around Rin's lithe form. She feels so soft and so warm, like a sweet and sexy teddy-bear.

My lips curl upward at that silly thought. Maybe I just come up with the sequel to Tokyo Teddy Bear. I'm sure our label would love the idea.

I guess I must have dozed off again, because the next thing I know, I could feel something squirming beneath me. Still drowsy, I frown ever so slightly, too comfortable to try to figure out what it was and yet just disturbed enough to wonder.

Then the hand settles on my breast, and I understand.

Len is starting to rouse. And the first thing his instincts are leading him to do was grope my breasts.

I used to tease him over how many of his songs cast him as some kind of swaggering playboy. As if innocent little Len knew a thing about women! Well, clearly I owe him an apology. If I knew that he was this smooth with his movements, then I might have made a move much earlier!

But that is not all I feel from him. I drifted off to sleep with him holding me from behind, the little spoon to his big spoon. As such, his hips are pressed right up against my rear.

You can probably see where this is going. Len was completely spent at the end of our night, every drop of lust and vigor thoroughly wrung out by his sister and I. So his, shall we say, manhood was laid soft and spongy up against my, er, my derriere.

This is no longer the case. As he begins to rouse, so was that part of him. I literally feel him twitch and swell up against me.

A small smile creeps its way across my lips. I already got to know how that part of him felt when it was pressed against other parts of me. As well as in.

I begin to roll my hips in slow, undulating motions, grinding my rear against his stiffening penis. Len is still at least a little asleep, as he lets out a sleepy moan and simply readjusts himself against me. The hand holding my breast tightens, though.

I consider reaching back behind myself to see if I could take his cock and slip it inside of me. Rin told me of a very special good-morning surprise she had given him once, so he is perfectly fine with that sort of thing.

But as tempting as the idea is, I know that I can't. Len is unwrapped, and I sort of was the one to insist that they start taking safe sex more seriously.

…

Of course I couldn't hide in my room forever, though part of me really wanted to try. Maybe if I did, if I just remained in place, huddling on my bed, the sheer crushing weight of what I had just witnessed couldn't get to me. I could just stay safe in my own little world and do my best to try to block out the image of adorable little Rin being plowed by her own brother.

But the world did not work that way. Hiding wouldn't make the problem go away, and with the two of them staring down at me from my wall, it wasn't as if my room was any sort of sanctuary. I had to face them.

So, once I felt that I had regained enough of my composure, I took one last deep, cleansing breath and rose from my bed to head for the door.

Though the distance from the side of my bed and the door to my room was only a few meters, it felt like the longest walk I had ever taken, with only the walk from my dressing room to the stage for my first live performance even coming close to compare. I was keenly aware everything around me, from the placement of my furniture to how the dust motes danced in the light seeping through the window planes to the muffled roar of the neighbor's weedwhacker.

The hallway was empty, so the Kagamine twins had both given up on trying to get me to come out. I knew where they were, though. Rin's door was now shut.

Steeling myself, I walked over to her room and listened. From within, I could hear the two of them speaking in hushed tones.

Well, here goes.

I swallowed back the lump in my throat and lifted my hand to rap my knuckles against the door. The whispering immediately stopped.

"Um, guys?" I said. I was trying very hard to keep my voice calm and steady, but there was no disguising how much it quivered. "I'd…I'd like to speak to you, please."

I held my breath. If they, like me, decided not to answer the door, then we would be stuck in stalemate. What would I have to do then? Tell the others? Perhaps I should. Something like this affected everyone in the house, not just the twins. If word ever got out, then all of our careers would be ruined.

But I couldn't do that! It would destroy them! Whatever they might have done, I couldn't let that happen to them! No, there had to be a way to fix this. If only they came out to talk to me.

Fortunately, they did. The door unlocked and opened.

The two of them had both dressed, thank God, but other than that they were a mess, their faces red and blotchy from crying. I had no doubt that the poor things were terrified.

"Um," I said. "Well, could you two...come with me? Downstairs? To talk?"

Rin's whole body seized up in terror. Holding tight to his sister's hand, Len said, "You, uh, didn't..."

"I didn't tell anyone," I promised him. "Didn't call anyone or anything. I just want to talk. Okay?"

The pair both heaved huge sighs of relief. "Okay," Rin whispered, giving her brother's hand a squeeze. "Okay."

I led them downstairs to the dining room table. From there we all took our seats, me at one end, and them side-by-side at the other.

"All right," I said once we were all seated. "Um. S-So, I guess we should. Discuss. What I just saw. And, um...What did I see? And how long has it been going on? And...how did this get started?"

The pair of them winced in stereo. Len shot a guilty look over to his sister, cleared his throat, and stammered, "W-Well, it's…it's like…"

"Y-You see…" Rin said, right after.

This was clearly going to take some time. I sat back in my chair, crossed my legs, and waited.

Slowly, with much hesitance, the story began to come out. They told me about how once they both had hit puberty and began to become aware of the opposite sex, they realized that they only had eyes for each other. They spoke of how annoying all of their admirers were, of how stressful it had been to ward off the constant notes, gifts, and confessions, and how worried they had been that someone might take it too far. That much I fully understood.

But they also spoke of how no matter how attractive any of their potential suitors were, they just were not interested, because who could compare to their twin? They said that no one, not even the older idols and models that they met through work, really held any appeal for them. But just being in each other's presence was enough to send flutters through their heart.

They had both tried to repress those feelings, fearing that it would wreck their relationship with their sibling and make the other hate them. But then, on one fateful night, Rin had accidentally caught her own brother touching himself while crying out her name.

I tried to maintain my stern temperament, but the blush that that little tidbit brought to my cheeks threatened to ruin it. I couldn't imagine finding myself in that situation, on either side.

However, rather than spell their doom (or at least, not yet), it had only driven the two of them to finally confess their feelings for one another. They told me how relieved, and how overjoyed they were to discover that the other felt the same as they, that all of their worrying had been for naught.

"Oh," I said. "Erm." I glanced down at the table, where the thumbs of my folded hands were busy waging war against one another. "I guess that would be-" What? Guess it would be what? "S-Say, how long ago was this?"

Rin grimaced. "It…It was…"

"Ab-b-bout three months ago," Len finished for her. He ran his shaking fingers through her unruly hair.

I mentally rewound my memory. Three months? Did anything strike me as amiss in that time? "And you two have been-" I bit my lip before the F-word could slip out. Call me a prude, but I just didn't feel right in saying it, especially in this context. "-having sex this whole time?"

They both shook their head. Apparently, this weekend of having the house to themselves is when they had finally dared to fully give themselves to one another. Before then, they had to make do with kissing in what scant few moments they had alone, fooling around a little during bath time ("So that's why you've been taking so long!" I exclaimed, to both of their chagrin), and a few late-nights trysts, when they would do things like masturbate one another, or give each other oral.

My head was spinning as each new bombshell knocked me for a new loop. All this time, and this had been going on right under our noses.

How many times had I banged on the bathroom door to get them to hurry up and let someone else take a shower, completely unaware of the scandal taking place just beyond? How many times had I fallen asleep while they engaged in these acts just a few rooms down?

Anyway, as they said, when they learned that everyone else would be gone for a few days, they had resolved to finally go all the way. Which they had. Pretty much as a nonstop pace starting an hour after everyone had left. And they had gotten so caught up in it that they had forgotten to keep their phones near them and hadn't heard any of my attempts to contact them.

I wasn't sure which appalled me the most, that they would do something like this to begin with, or that they would be so breathtakingly careless about it! Because let's face it: our world was not unfamiliar with scandal and controversy. When so much of what we do is based on image, slipping up can be catastrophic. I mean, you wouldn't want to learn that your purehearted idol had a smoking problem, would you? Or that they secretly hated someone that they often shared the stage with. Or that they were…regularly having sex with their own twin!

My point is, yes, we are fallible. We are human. We have our weaknesses, our vices, our personal struggles with our mental health. And as a result, it's far more common than you'd think for us to develop bad habits or toxic personality traits. It just happens. But an ironclad rule was that you dealt with that sort of thing in private!

I know it sounds cynical, but it really is important. Get whatever help you need, confide in those closest to you, but never, ever let the fans or the media know. As such, whenever someone would get careless and get caught doing something that acted contrary to their image, it's always baffling to me that they wouldn't have been more careful! God knows, if I had something going on that could destroy my fans' faith in me, no one would ever catch so much as a whiff!

Seeing the look on my face, Rin winced and said, "I know. We were stupid. We never should have been that far from our phones."

"Um," was all I could say. "Well, th-that's true, but that's not really…I mean, it's not like it's the most important-"

Then I sighed. Time to stop dancing around it.

"Right," I said at last. Now it was time for the big question, the one that I guess they had already technically answered, but had to be asked anyway. "Tell me this. Why? Why each other? You're…You're brother and sister! I'm sorry, but it's just wrong!"

The two of them stared shamefaced at the table, and as they should! I mean, this bit of wisdom was as common as it got, right? Take care of your teeth, stay away from drugs, and don't have sex with your own sibling!

And yet I could see something else in their eyes, Len especially. A sort of resentful frustration, the sort you got from someone doing something that they knew full well was wrong, but also felt fully justified in doing so while knowing that no one could be convinced otherwise. I had seen that look before, when I and someone close to me had almost slipped up ourselves. I had felt that same frustration at the time.

"Miku-nee," Rin said in a small voice. "Who else do we have?"

God help me, I came this close to snapping back at her that it didn't matter, that nothing justified something like this, but before the words could well up and reach my mouth, they withered and died in my throat.

Because she was right!

Look, I'm not going to lie and say that that the life of a pop idol is horrendous. We wouldn't be doing it if we didn't love it. But there still were a great many hardships to be born, from the grueling hours spent recording, rehearsing, and performing, to the lack of privacy and intrusive interviews, to not knowing which fans were safe to interact with and which ones were going to make things weird. And one of the most severe drawbacks was how it affected your love life.

Idol culture had certainly come a long way from the days of old, when simply going on a date risked upending your entire career, but it still had a long way to go. Meiko and Kaito's own relationship had almost derailed theirs, and I think the storm had only passed in part because they were older than most idols still performing, things between them were an open secret anyway, and the surprising success of the younger members of the unit that they had founded (such as myself) silenced the naysayers pretty thoroughly. Even so, things had been a little dicey for a bit.

I remember when I had started to come of age when I would be interested in that sort of thing, and I had asked Meiko why we were discouraged so firmly against having romantic relationships. And she had explained that unfortunately, as idols, our brand was built not only on the music that we produced, but on our image as well. Many of our fans looked up to us as some kind of perfect ideal, and would be crushed to find that we in truth were as fallible as they were.

And, unfortunately, I would be lying if I said that I had not slipped up once or twice myself.

The first time had been with my unit-mate and performance partner Luka. We had always been close, having been hired at the same time and training together. The magazines sometimes referred to our relationship as "sisterly," but the truth was that it had come close to being something else entirely.

We had been coming close to the end of a particularly exhausting tour of the United States. All of us were worn out, and while it had been a good time, we were looking forward to returning home and enjoying a nice long rest. Luka and I often shared a hotel room, and one night, after a show in Chicago, we ended up fooling around a bit. It was nothing too scandalous, just a little kissing and a lot of roving hands, but we liked it a lot, so much so that we started wondering what would happen if we did make things official between us. Maybe we could even go public with it, make it part of our brand.

Unfortunately, Neru, our manager, had shut that down quite firmly. It was too dangerous, she told us. Same sex relationships are still looked down upon by many, many people. Besides, no one would accept either one of us being in any sort of romantic relationship, much less a homosexual one!

So, that had been the end of that, though we had been more than a little bitter about it. The song "Magnet" may have been written with just a little bit of spite. Oh, the lecture we had gotten when we had released that one on the sly, especially given the flurry of rumors that had sprung up in its wake. That mostly died down when the song became a hit, but it's still a fight whenever we try to add it to one of our sets.

I talked about it later with Lily, a friend of mine from a different idol unit. Of all the idols of my acquaintance, Lily stood out in her brazen disregard for the rules and traditions of being an idol. In short, she did what she wanted, whether it be seen drinking in public or using coarse language on her social media profiles or even openly going on dates. One interview that had nearly gotten her in a lot of trouble is when she had joked about all of her favorite sex positions, only for it to be forgotten when she had been photographed topless at a party in Roppongi, an outcry that she took great delight in stirring by reposting the memes that had sprung up as a result. Lily always seemed to be in the gossip cycle for one controversy or another, and yet nothing ever seemed to stick.

To my lack of surprise but full appreciation, she had fully agreed with me. "You should have gone for it," she had remarked over the strawberry shortcake we had been sharing. "Like, who cares? Who even cares? Given how much fanfiction there is of you two, I'd say it would only make your appeal rise even higher!"

I'll admit, I had no idea what she meant by "fanfiction." It had been a new word to me! And of course, once Lily had learned that, she had insisted on taking her phone out and took great pleasure in, ah, "educating" me. Perhaps too much pleasure.

I learned things that day that I could stood to have done without, but the point is that being an idol really puts a damper on your dating life. And it was even worse for people like Rin and Len, who have had so much of their marketing focus on their childlike appeal! So, if they wanted someone that they could be close to and openly affectionate with and not have to deal with raised eyebrows and probing questions, who did they have other than each other?

I really hated to admit it, but I was starting to see things from their point of view.

But what could I do? Yes, it was unfair, but that was part of the life they had chosen! And it was also unfair that they would put the rest of us at risk just to satisfy those urges! Did I demand that they put an end to things right here and now, and that will be the end of it? Did I tell the others? They deserved to know; it was their careers being threatened as well! Or did I-

The realization of what I was considering thudded into my chest. No. No, I couldn't seriously be thinking…But could I?

Like it or not, that song had been sung. As perverse as it might be, the two of them were in love. They had confessed. They had kissed. And now they were having sex. Their own sibling, and they were having sex with one another. There was no turning back from that.

Shutting it down now could only make things worse. How could the three of us go on, knowing what we now knew? Would they grow to resent me for taking this small bit of happiness from them, their only chance to know what being loved was like? Might it also sour things between them?

And I also just couldn't tell the others, either. Yes, objectively they deserve to know, and doing so might be the morally right thing to do. But I knew in my heart of hearts that I just couldn't do that to the twins. It would ruin their lives, destroy all trust anyone had for them, at the very least cause them to be fired, and once that happened it would not take long for word to leak out. They were public figures, and this would turn them into pariahs.

Besides, for as stupid and selfish as they were being, I also couldn't deny that it felt wrong to take this happiness away from them. They loved each other. Shouldn't they be allowed to have that at least?

This was a heavy decision I had to make, one that stood to affect them, myself, and everyone else that we knew. The very future of the Vocaloid brand was at stake. Would I risk soiling that to look after my stupid, selfish friends?

The answer, as it turned out, was yes.

I slowly breathed out. "Okay," I said at last. "I…get it. Or at least I think I do. There's still a lot that I don't understand, but I do get it."

Len's face lit up with pure joy while his sister clapped her hands over her mouth. "You…You do?" she squeaked.

I slowly nodded. "It's extremely weird for me. But when you put it like that..." Then I slowly breathed out. "Okay. Okay. Give me a second here."

Leaning forward, I buried my face in my palms and let out a long, exasperated groan. Oh, why did I have to be in this situation? Why couldn't I have caught them hiding some kind of dangerous pet from us or something simple like that?

"Okay, better now!" I said as I pulled back. "But, you two are being careful, right? I mean, I get it, but there's a lot of people who would-"

"Of course we are!" Rin exclaimed. "We never do anything when there's other people around!"

Then Len let out an awkward sounding cough. "Well, there was that one time you flashed me at that concert."

I stared. "Wait, huh?"

"Oh, excuse me!" Rin snapped at her brother. "Exactly who was grabbing my ass throughout the FANZA interview?"

"Hold on, what?" I exclaimed.

"Only when nobody was looking, and that was because you wouldn't stop rubbing my thigh the whole ride there!"

I was aghast. I had thought that they would be smarter than this! "Guys, are you serious? Were you really being that reckless?"

The shame returned to their faces, and they again found something strongly fascinating about the top of the table.

I had to take a few moments to compose myself. Suddenly, I was very thankful that I had caught them, if for no other reason than I was now able to step in and put a stop to their nonsense.

"Okay, well, that's going to stop!" I said. "Guys, whatever reasons you might have for...being like this, doing stuff like that in public is so dangerous! Don't you understand what would happen if you were ever caught? The press would eat you alive!"

Rin looked like she was on the verge of tears. "I...I'm sorry. I know, we were stupid."

"We...We won't do it again!" Len said. "We promise!"

Rin was aghast. "Wait, never again?" she gawked in horror. "Len, I-"

"I mean being dumb in public! Not...You know, the other stuff!"

Actually, that reminded me of something, a very, very scary and dreadful something.

"Um, speaking of which," I said. "You guys haven't been...dumb in private either, right?"

This question earned me twin stares of befuddlement.

"What do you mean by that?" Rin asked.

"Well, you know..." I said as I fidgeted in my seat, my thighs anxiously rubbing together. "You two have been, uh, safe, right?"

"Huh?" Len said.

I could not believe that we were having this conversation. "P-Protection. You've been using protection, right?"

Unbidden, an image smashed its way into my mind, that of Len's slick and dripping cock as it slid out of his sister's little pussy. Oh no.

Rin must have seen the look of horror on my face, as she quickly jumped in. "Miku-nee, don't worry. It's still my safe day!"

"Oh," I said. "Oh, okay. That's good."

I wanted to feel relieved, but something about what she had just said didn't really sit right with me. Safe days were called safe days for a reason, right? So there shouldn't be anything to be…

There was, wasn't there?

Though I feared what I would find, I picked up my phone. From there, I brought up the search engine and typed in a simple question.

"Wait," Len said, his back going straight in alarm. "Who are you texting?"

"I'm not texting anyone," I said, my focus on the screen. "I'm just looking up-"

The answer popped up. I sighed.

"Guys," I said as I turned the phone's screen toward them. "You can still get pregnant on your safe day."

"Wait, you can?" Rin cried as she snatched the phone from my hand and stared down at the damning search result.

Len's face had gone pale. "You told me it was okay!"

Whimpering, I sank forward, my face molding itself into my waiting palms. "Guys," I pleaded. "Please tell me you didn't spend the weekend having unprotected sex."

They didn't respond. But then, they didn't have to. Their shameful silence was all I needed.

"Okay," I said at last. "That's something else that's going to stop! It's clear to me that you two have been taking way too many risks. I get that you're all happy and excited, but please be more careful! Whether it be how you behave while in public or practicing safe sex! Len? Please get yourself some condoms, and always use them, no matter how good it feels without them! Rin? We're going to need to get you tested as soon as possible. I'm pretty sure you're not pregnant, but we're not going to take chances. There are some people I can talk to about getting you equipped with a…" I then blinked in confusion. "Um, why are you two looking at me that way?"

Both of the twins were regarding with an expression not unlike awe. "Uh, wow, Miku-nee," Len said with a slightly nervous laugh. "You kind of sound exactly like Neru-sama."

"I-" My mind then blanked out for a second. Neru? I was starting to sound like Neru?

It wasn't as if I disliked Neru or anything. Actually, I liked her a lot. It was just that, like the thing with Luka showed, she could be a little stern at times. Actually, she could be very stern. And that was a good thing! Yes, we all got annoyed with her at times, but we also needed someone like that to look after us and catch the things that we might have missed.

Actually, wasn't that exactly what Rin and Len needed now? Someone stern to keep things under control? They were engaged in something totally dangerous, and had slipped up a number of times! It wouldn't be long before they were caught by someone much less understanding!

"Actually, you're right," I said as I called upon countless memories of Neru's lectures to make my voice and demeanor as stern as I possibly could. "From now on, I'm your Neru-sama. If you're going to keep doing this, then you need someone to look after your best interests!"

Rin blanched. "Hold on. You're going to be our manager? For our love affair?"

"Yes," I said firmly. "That's exactly what I'm going to be."

Len frowned. "Is it still really an affair? I thought it was only called an affair if we were cheating on someone."

"It doesn't matter, Len!" his sister said.

"If you have to hide it, then it counts as an affair," I told him. "And as your affair-manager, here is what's going to happen. We will be keeping this private. So, no more teasing each other in public. No more sex without proper protection. If you guys want to try something new and daring, then please run it by me first!"

At their despondent looks, I said, "Hey, don't give me those sad puppy-dog eyes! This is serious! You guys were being really reckless! I get why you're together like this…sort of…but I don't want to see you hurt!"

"Right," Len sighed. He slumped into his chair, one trembling hand kneading his disarray of sweaty blonde locks. "S-Sorry."

God, he looks so hot like-

I blinked, and then shook my head hard to banish that line of thought. No! Just because I had just seen him naked didn't mean it was okay to think of him like that!

"Okay, like I was saying, I don't think you're actually pregnant, Rin, but we need to make sure! And after that, I'll see about getting you an…" I frowned. Wait, what were they called again?

I grabbed my phone and made a quick search. "And IUD!"

"A what?" Rin said, staring blankly at me.

I showed her. "This! It's like 99% effective at preventing pregnancies!"

Len's face lit up at that. "Really?" he said as he leaned in to look over his sister's shoulder. "You mean we won't have to-Oh, wow, that looks really uncomfortable!"

"Yeah, I don't know, Miku-nee," Rin said with doubt all over her face. "I have to put that thing up my…well, up my you know? Isn't that…dangerous?"

"No, it's perfectly safe!" I reassured her. I remembered Lily telling me about them and what a lifesaver they were. "See?" I scrolled the page down and tapped my finger against the screen. "It'll feel a little weird for a couple of days, but then you'll be fine!"

"Okay, but then we'll be okay?" Rin said. "Len won't have to wear condoms?"

"Oh no, he's definitely always going to wear a condom," I told her. "Plus, you're going on the pill."

Their faces both scrunched up in twin looks of disgust. "Oh, come on!" Len whined.

"Really?" Rin said. "You said this creepy thing would keep me safe!"

I silence them with a stern look. "99% still leaves that 1%! And given the way you two have been acting, I get the feeling you're going to be having sex enough times to put that to the test!"

"That's true," Len said with a sigh.

"Good! Then it's settled!" I paused for a moment, and then softened my tone. "Okay. I know we all have a lot to get used to here. I can't promise that I'm entirely, um, okay with this, but what's important is that you two stay safe and happy. So if you two promise to start taking better care of yourselves, I'll see what I can do to make sure that nobody else finds out about this. To me, that's more important than any, um, reservations I might have about how you two are..." Darn. What was the right word to use? Frowning, I rolled my wrist while wracking my brain. "...are, um, relating. To one another."

That was most definitely not the right word, and as soon as it left my mouth I felt my insides contract upon themselves in embarrassment. Relating to one another? Really?

But in a way, my cringe-inducing choice of words did more to reassure them than anything else could. Len's cheeks puffed out as he tried to restrain the surprised bout of laughter, while Rin covered her mouth and coughed. As for myself, I let my eyes flutter closed as my cheeks began to prickle.

Rin's eyes then met Len's, and it was like a switch had been flipped. They just burst out laughing at my gaff. Meanwhile, there was nothing I could other than sigh and take it.

"Okay," I said after I had taken all I could stand to take. "Ha-ha. Let's all laugh at Miku."

"S-Sorry," Rin said, wiping a tear of mirth from her eyes. "I just...wasn't expecting that."

Len noisily cleared her throat. "But, um, thanks. For being so understanding."

Truthfully, I still wasn't sure if I did understand. Part of me was still furious with myself for allowing myself to get involved in this. But what else could I do? Any other route would only hurt them, and there sure was no chance in heck I would let that happen!

I nodded to Len. Then I said, "Look, guys. All of this is still...really weird for me, but I promise I'll do my best to look after you. And I think we can all agree that we need to help each other be careful in this, so please, promise me that you'll be safe from now on."

"Definitely," Len said.

"Cross my heart," Rin added, making an X over her chest with her finger.

I sighed as a little bit of the tension knotting my shoulders began to ease away. Maybe this would be okay after all.

"Okay, you two, bring it in," I said, spreading my arms. Rin and Len were only too happy to comply, as they both quickly left their seats and hurried over to join in a great big group hug.

"I'm so glad we have someone like you," Rin said as the three of us wrapped our arms around each other.

I smiled. And how could I not? This was a monumental secret I was being trusted with.

However, that smile wavered a bit, as my body took notice of something...interesting.

I of course had hugged both Rin and Leng quite a lot at different times. This wasn't even the first three-person embrace we had shared. I'm a hugger; always have been. And it's just how I like to show how much I care about someone.

However, though those embraces and cuddles I had shared with the two Kagamines in the past had all been perfectly innocent, now that I knew just how dirty their minds had gotten, and now that I knew what they looked like under those clothes, holding the two of them close was doing strange things to me.

Mainly, I found myself wondering what it might be like to have been in Rin's place.

Or Len's.

…

Len takes his time waking up. In the meantime, I'm content to simply bask in the comfort of the two young bodies sandwiching me from the front and back, letting the beautiful boy's hand go to work gently kneading my breast.

I smile. Even when still partially asleep, he is a master with his fingers.

And then Rin yawns, her tempting rosy lips parting her cute little mouth, a mouth that tasted so sweet against mine last night. I got to know the taste and feel of both of them Kagamine twins very well, just as they got to know mine.

I did not know where our decisions would ultimately take us. I just know that the memory of that first night together was precious to me, and one I would always treasure.

Rin's eyes finally open and stay open. She sleepily blinks once before rubbing her knuckles into her eyes, working the rest of the grogginess out.

Another blink, and she finally sees my face, mere centimeters away from hers.

"Oh!" She awakes fully, her body going stiff while her mouth formed a perfect O.

I laugh, and reached up from out of the covers to tap my index finger playfully against her nose. "Forgot I was here?"

A light rose blush colors her features, and she shyly shrinks back into the blanket. "I, uh..."

"Oh, don't give me that. C'mere, Cutie!"

I pounce, seizing Rin up into my arms and kissing her all over her face. She squawks in surprise, but then stars laughing.

"Miku, cut it out!" she giggles as she futilely tries to push me away, but I'm both bigger and stronger and determined to cover her with my kisses.

And then I hear a soft chuckle, coming from behind me. I pause in my smooching assault to look over my shoulder.

Len also has come fully awake, and was now leaning casually on his side, watching the two of us in amusement and open desire. God, he looks so effortlessly sexy like that, from the way his tousled golden hair hangs around his face to the charm of his boyish grin to the way his lean muscles rippled with every movement. The sheet still lay across his thighs, but it does nothing to hide how he was now fully erect. If anything, the tent that formed only draws attention to it.

Our eyes meet, and he smiles at us with that lazy charm that keeps his fan mail filled with smitten admirers.

"Oh, don't mine me," he says while letting his eyes rove over Rin and I both. "Just enjoying the view."

I bet he is. I glance back at Rin, who merely rolls her eyes while letting out a soft chuckle.

I move in, warmly pressing my cheek to Rin's. "Care to join us?" I flirt as I lift my rump into the air and give it an inviting little wiggle.

"Oh my, what a tempting offer," Len says, shifting his body toward us. "Don't mind if I do."

As he moves, the sheet slides away, revealing his thick, bulging shaft, standing straight and proud. Just the sight of it ignited the smoldering embers that I had been stoking deep inside of my core, and hot fires of desire burned through my veins.

…

What I found the scariest of all was how normal things became afterward.

Life craves normalcy, I suppose. Or at the very least routine. Once I had resolved to help the twins hide their dirty little secret, it was as if everything shifted into a new kind of normal, one that, while definitely not as safe as the old, was at least functional.

A worried text from Luka reminded me of my reason for returning to the house, and I quickly apologized, explaining that the rain had held up traffic even worse than anticipated. It wasn't quite a lie, because that had happened, but I still felt rotten about concealing the truth from her. I retrieved her medication and took another cab back, and if she noticed that I was a little more frazzled than normal, she must have chalked it up to the bad experience on the road. Regardless, she was very thankful, and somehow I was able to go through with the rest of my vacation without accidentally dropping any secrets. It did put a damper on my enjoyment, though.

We got Rin tested, and thankfully the results came back negative. That was a major relief for the two of them, though it didn't spare them another lecture about being safe and responsible with their incestuous couplings. After that, we got Rin on the pill and fitted with an IUD. It actually wasn't as difficult as I had thought. Turns out, management was actually very keen on its talents being on birth control, and Luka already had one. I just told Neru that Rin had complained about her period, and the arrangements were made.

"Honestly, it's long past due, anyway," the stern blonde woman mumbled as she tapped at her tablet. "Better safe than sorry."

I found myself nodding in agreement before what she had just said registered in my mind, and when it did it was like tripping over the curb, only mentally. "Wait," I said. "What d-do mean, 'better safe than sorry'?"

She glanced up to stare down her nose through those half-moon glasses of hers at me as she did whenever one of us has said or done something particularly stupid. "Miku. Please. She's fourteen. That's when things start happening."

"What things?"

"Unbelievable," Neru muttered as she turned her attention back to her tablet's screen. "I hope you don't need me to explain these things to you. Because if your education is truly that lacking, then I'd have to bring out the whiteboard and start making some very uncomfortable graphs in order to get the point across."

This sparked a swell of annoyance in me, which happens a lot when dealing with Neru. Oh, don't get me wrong, she's a great manager, and a lot more personable than people give her credit for, but if she thought that you were being stupid, then she will make you feel stupid. And the list of things that she considered stupid behavior was unfairly long. "I know about that!" I protested. "I mean, why would you think that Rin of all people would be, you know, interested in that sort of thing?"

"Because she's a teenage girl in a high-stress world surrounded by attractive people with type-A personalities. It's only natural." As I stood there mortified that that Neru would so casually insinuate that sweet, innocent Rin would ever do something like that while terrified that she might realize that sweet, innocent Rin actually was doing stuff like that, something further seemed to occur to her, and she glanced up while tapping her stylus against her lower lip. "Come to think of it, we should probably see to Len as well. Make sure he's properly stocked up."

"Stocked...Stocked up on what?"

"Condoms, obviously. Can't have him leaving little Kagamines all over the place. Some spermicide would also be of use." She finally glanced my way. "Oh, what? It happens!" Tucking her tablet under her arms, she headed out, her hard shoes clacking against the highly polished floor of our agency's headquarters. "Remind me to tell you of some of Kaito's exploits one of these days. Anyway, let her know that I made an appointment for next Wednesday, nine in the morning. We'll have to be discrete about this, but that goes without saying."

I wasn't sure what I was the most taken off guard by, Neru's casual agreement to hook both of the twins up with all the birth control that they might need, or her frank acceptance that Rin might be sexually active. Either way, I had absolutely nothing to say as she left.

But then Neru paused. "Actually, so long as we're setting this up, we might as well get one in you as well."

"What?" I squeaked.

She started tapping again at her tablet. "Your periods are fortunately not very strong, but every little bit helps. Besides, the next time you decide to get handsy with someone in your hotel room, it might be someone with a penis. Just ask Meiko. She also has some stories to tell."

With that she walked off, leaving me as a sputtering mess in her office

And that's the story about how I successfully managed to get Rin supplied with birth control and fitted with an IUD...while also having to get one for myself. I will not go into detail about the process; just know that sometimes you just have to take one for the team, and I took this one. To help Rin and Len cover up their incestuous relationship.

I hope they're thankful.

Regardless, the deed was done. Rin (and, by extension, I) was basically fixed at this point, Len now had a new condom collection for him to keep track of (this I had drilled into his head, as letting slip that he was keeping those on him could be pretty bad in its own right), and so the twins...

Well, they were having sex again. With my help.

They kept their end of the bargain, I had to admit. Any time they wanted to make "plans," they discretely ran them by me first. Rin stayed on her pills, and Len always used a condom, and they both took great pains to clean up after themselves. And there was no more funny business when in public. And that was the end of that. We could settle into our new normal, and just keep things under wraps. No reason things had to change in any way.

Or so I thought.

One night, it was just the three of us. Meiko and Kaito were at another meeting while Luka was in the studio. And you might find it strange to hear, but most of the evening was completely and utterly normal, almost boringly so. We all pitched in to prepare dinner, whipping up a tuna casserole and a light salad. We made conversation over dinner, discussing a nature documentary series we had all seen lately while discussing the upcoming summer event. The twins had recently dropped a new single that was tearing up the charts, and they were eager to debut it live at the show. Len pointed out that it had been a while since Rin and I had sung a duet and suggested that maybe it was time for a new one, which we both agreed with. Just looking at us, you would never have been able to tell that Rin and Len were engaged in an incestuous affair and I was helping them conceal it from the world.

After dinner, we all cleaned up, the twins doing the dishes while I took care of putting the food away and wiping down the kitchen. As I worked, I couldn't help but watch the other two out of the corner of my eye. I swear I wasn't trying to be a voyeur, but as someone who was now sort of their...manager? Producer? Was that what I was? Was I managing their affair? Well, whatever I was, I did have to oversee things and make sure that they weren't letting things slip, even if it was just us!

And to their credit, though it was just me, they weren't letting much slip. Rin cleaned, Len, dried, they talked and joked and goofed off a bit. Rin splashed Len with the dishwater at one point, and Len retaliated by smacking her arm with the washcloth. Perfectly normal sibling behavior!

Well...most of it, anyhow. I did catch Rin's right leg sliding up to run her shin against the back of Len's calf. And as I was taking out the trash, I caught Len's hand creeping over to give Rin's bottom a pinch.

I admit it, they did have me worried. Maybe I should have said something, but I didn't want to start an argument or come off as the mean, overly strict sempai. That just wasn't me! Besides, it wasn't as if there was anyone around to see, and even if there were, maybe people wouldn't notice! Those two teased each other all the time! This was just another form of that, right?

I was starting to see how those two had gotten so careless before I walked in on them.

At any rate, we finished cleaning up, and Rin and Len headed over to the couch to watch a basketball game. As for me, I set up my laptop on the kitchen table to catch up on some work.

I admit that I didn't get much done, mainly because I couldn't keep my eyes from wandering over to the twins. At first things seemed innocent enough. Len was sitting slouch on one side of the couch, legs spread and one arm thrown over the couch's back, while Rin had brought her feet up and was curled up in a ball at the other end. A perfectly normal portrait of a couple of siblings enjoying a sports game together.

But as time went by, the positioning of their bodies began to shift, especially Rin's. At first, she was lying with her head reclining against the arm rest. But then she eased herself around, so that she was sitting up straight.

I tried to ignore them. I had to focus on my work.

Though I knew that I probably shouldn't, I glanced up again. Rin had shifted her position again. To be specific, she had shifted her position all the way across the couch, to lean her body against that of her brother. In turn, Len had draped his arm around her, letting his hand run up and down her side.

The innocence of their interactions was swiftly depleting, as was any plausible deniability that there was anything familial with how they were touching one another. I hastily turned my attention back to my laptop, but any pretense at getting any work done was a bold-faced lie. Instead, I kept on watching them over the top of my laptop's screen.

Now Rin's hand had laid itself on Len's leg. Now it was moving over Len's leg. She wasn't touching any skin yet, nor was it heading toward any sensitive areas, but it was getting awfully close. As for Len's hand, it was now resting comfortably on his sister's butt.

God, why did everything they did together have to be so stupidly adorable? They just looked so perfectly content touching each other like that. There was a radiance coming off of them.

I shouldn't be here. It was clear where this was heading, and I didn't want to have to watch. But if that was the case, then why was I finding it so hard to avert my eyes? And why did I like what I was seeing so much-

Suddenly, Len turned off the game and the two of them hopped off the couch. To my embarrassment, a small squeak of surprise escaped my lips, and I clamped my hand over my mouth while a hot blush spread over my cheeks.

Fortunately, neither of them commented on my lack of decorum. "Um, Miku-nee," Rin said as her hand slipped into her brother's. "We're going to go upstairs for a little bit." She had a pretty radiant blush herself. "You know. If th-that's all right with you?"

How had it come to this? My twins, my dear, sweet, innocent twins were now asking me for permission to go have sex with all the casualness of wanting to stay up an extra hour past bedtime!

"Oh," I responded. "O-Okay. Just try not to make too much noise!"

"Don't worry!" Len said with a grin that could only be described as "scandalous." "We won't!"

I watched as the two of them raced for the stairs, still tightly holding hands. Len reached the stairs first, and Rin playfully swatted his butt as they headed to the second story. Moments later, the door to Rin's room slammed shut.

I glanced after them and sighed. By now they would be stripping one another in the throes of passion, clothes flying and hands groping as they gave in to their unbridled lust. It would be almost touching if it weren't just so stupidly perverse.

Not for the first time, I found myself wondering how people would react if word of this ever got out. Of course, the backlash would be severe, but just how badly would this soil everyone's opinions of Rin and Len? I imagine it would be earth-shattering for most, given that they were supposed to be the paragons of innocence and-

My drifting thoughts were yanked to a sudden stop as something occurred to me.

What exactly was the fans' thoughts on Rin and Len? More specifically, their purity?

It was a troubling thought. I knew that many people had some pretty interesting ideas regarding myself; my brief excursion into the seedier side of the internet had told me more than I wanted to know and confirmed that I most definitely did not want to know anything further. Besides, I knew that my fan mail was heavily vetted, and there were things that people sent me that I was never to know about. And that wasn't even getting into the stuff Luka had to deal with.

But what about the twins? Surely people didn't...

Now that the idea had been planted in my head, it was impossible to get rid of. Like a persistent itch, it kept niggling and niggling at my thoughts. I tried to shut it out and refocus my attention on my work, but the awareness that all I had to do was open the search engine and type in a few measly words to find out was almost unbearable.

Sometimes, you get struck with some kind of mad, impulsive urge to do something that, while not necessarily bad in of itself, definitely will lead you down a dark and shameful path. You try to ignore it, try to turn away and distract you, but deep down inside you know that it is only a matter of time before you give in. It's just so easy, and the temptation so sweet.

Which is why, without even making the conscious decision to do so, I found myself getting up from my seat at the dinner table, carrying my laptop into the living room, and settling down on the couch so recently abandoned by the twins. I sank into the cushion, opened the search engine, and began to type.

I knew what I was doing was a bad idea. I was in too deep as it was, and looking further into this whole thing would expose me to things I could never unsee.

But I had already seen things that could not be unseen. The sight of cute little Rin gasping and writhing while her twin brother thrust his throbbing cock into her bare little pussy was forever seared into my brain. What could my investigations turn up that could possibly top that?

As it turned out, um, quite a lot!

I brought up the browser and, before I could talk myself out of it, searched for Vocaloid Fanfiction, which I knew would give me a more honest view into how our fans perceived us than any message board or social media post ever could. As a search, that was innocent enough, right? I wasn't delving too deep, was I?

I wasn't sure what results my search would bring me, but I was shocked nevertheless. I knew that we had a large and passionate fanbase, but why was there so much fanfiction about us? A cursory scroll revealed at least four dedicated sites, as well as multiple entries on several general fanfiction sites. The sheer volume was overwhelming.

I truly didn't get it. Why was there so much? I knew people loved our music and went to our shows and bought our merchandise and wrote us love letters that our managers had to filter out so we wouldn't be exposed...actually, it was starting to make a little more sense.

Morbid curiosity got the better of me, and I clicked on one of the links, almost completely at random. From there, I perused the list of stories, but was a little confused by the story synopses that I read. I wasn't exactly expecting to see a whole lot about the difficulties of putting on live shows or struggling to get a song right, but I also wasn't sure why so many fics were about something called Y/N. What in the world was Y/N? And why were there so many stories about us in relationships with this Y/N? Was it a newcomer from another idol group? Some other celebrity? I think I would have heard about them?

Another quick search, and things made a lot more sense. Okay, Y/N was short for "Your Name." As if in, those were stories that allowed the reader to live out a fantasy about dating one of us. That made sense. It was a little weird, I have to admit, but it was at least the sort of thing that I'd expect from our fans.

I skimmed past those, as they weren't what I was interested in. Boy, there sure were a lot of them. Plenty of them about dating me (was I really that desirable?), quite a few about dating Luka (well, of course), a shocking amount about dating Len (clearly, I had underestimated his popularity!), and a fair number about dating Rin (I really hope the authors were close to her age instead of a bunch of creepy old men). I also came across more than a few about members from other units. Gumi was also very popular, which didn't surprise me. And I also wasn't surprised to see Lily pop up a few times. IA had a pretty strong following as well, which also made sense. Haku took me a little by surprise, given her reputation, but I guess everyone would have someone into them. And I have to admit, I gave a little internal cheer when Teto started popping up. Neru just didn't make sense, though. She was our manager! It was weird!

I also have to admit, Meiko and Kaito didn't have nearly as many as the rest of us, but it did bring a smile to my face to have them show up here and there. I know most of our fans are on the younger side, but it's still nice to see that those who paved the way are still loved, even in the form of a somewhat questionable fanfiction about dating them.

However, as I scrolled past more and more silly stories about our fans achieving the impossible, my eyes settled upon one story and my heart just about skipped a beat.

The story was entitled 'Magnet of the Heart,' and it was about me and Luka.

It couldn't be. I know that Neru had been against the release of 'Magnet,' claiming that it would reveal too much about my relationship with Luka, but we were adamant. "It's about a hypothetical situation," we had said. "They'll just think we're playing characters! Besides, isn't being coy part of the appeal?"

Well, apparently, we had been just a little too coy! Someone had picked up on the song's true meaning, and had written and entire story about our failed attempt at a forbidden romance! What would I see if I were to click on that story? A disturbingly detailed recounting of that night we spent together in America? The fight with the studio executives? The-

I had to smack myself in the head to banish that unhelpful line of thinking. No, dummy, no! None of that happened! Of course people would pick up on the undertones we had written into Magnet and use them in their stories! That's what we wanted them to do, wasn't it?

Still, there was that bit of intuition that kept on wriggling inside of my head. Though part of me dreaded what I might find, I brought the mouse's cursor over the tag that read Hatsune Miku/Megurine Luka. I admit, I let it hover there for a few seconds as I gathered my nerves. If Lily was correct, then I was about to be exposed to a side of my fans that I was probably better off never knowing about.

But that song had been sung. I pressed down on the mouse's button and clicked the link.

As it turned out, Luka and I were a very popular subject of speculation.

Story after story lined up on my screen, all centered around the concept of us as a...couple? I guess? And that first story wasn't even the only one to use the word 'Magnet' in the title! Lily had been right. People were just really fixated on the idea of us being together!

I have to admit, part of was feeling just a little smug, and I did sort of want to go up to Neru, show her all of those stories, and ask her how she could think that people wouldn't accept Lua and I having that kind of relationship when there clearly were so many people enamored by the idea! Finally, validation!

But I was also feeling just a little bit overwhelmed, because wow, there were a lot of them. And as I skimmed over their descriptions and tags, I started to get the most uneasy feeling in my stomach. A few looked cute, but others were just a little too, um, spicy for my comfort.

And some were just outright obscene.

I didn't even recognize a lot of the tags that I saw, but the ones that I did were bad enough. It didn't take a connoisseur of all things perverse and degenerate to figure out what "girl dick" was supposed to mean, but to tell the truth, I was having trouble accepting that that was even a thing that people wrote about!

Though I have to admit, I was a little curious as to who had the penis in that story. God help me, I came this close to clicking on it.

Stop it! I angrily told myself. Get a grip! Look at you, browsing pornography about yourself! Could you possibly be any more narcissistic?

I moved on. And to be honest, what I should have done was move on from playing with fire like this. Just shut down the laptop and walk away. Was this how Rin and Len had felt at the beginning, struggling with what they knew what they shouldn't do and where their hearts were leading them?

Wait.

Rin and Len. Surely...

The last of my will ebbed away, and, before I could talk myself out of it, I found myself hastily scrolling down the list of popular pairings.

I did not have to go far. In fact, it was almost at the top.

Kagamine Rin/Kagamine Len.

I clicked, and the website provided. The sheer quantity of stories about those two having some kind of an incestuous relationship was almost overwhelming. All this time, and people were just writing stories about this...this filth?

You're the one to talk. They really are in an incestuous relationship, and you're helping them do it!

Shaking my head, I let my eyes skim down the brief story descriptions. It was much the same as before. Some were as basic as one of the twins being horny for no apparent reason and having sex. Others cast them as different characters, such as Rin the barista and Len the handsome regular customer. A few made it clear that they weren't related in this story. I had to scoff a little at that. Right, so by sheer coincidence they looked like near mirror images of one another.

Now, I know that what I did next was a bad idea. I know it was shameful of me to give in to my curiosity, that the forbidden fruit was better off untasted! But look how far I had gone already. Not only was I actively browsing through fan-written stories detailing all of our lurid sex lives, right above my head-

I paused, looked up, and took my earbuds out.

Though they were being considerate and tried not to make too much noise, I could just vaguely hear Rin's small gasps mixed with Len's strained grunts, combined with a slight rhythmic squeaking. Shuddering, I put my earbuds back in.

I was in for it anyway. Before I could talk myself out of it, I picked one story that didn't seem too extreme and clicked on it.

A few paragraphs down I hastily hit the page back and leaned back into the sofa cushion.

Oh. Oh, wow. They really hadn't wasted time getting to what people had come for, had they? I wasn't exactly certain if the things that they described the twins doing were true to life, but there was a strong possibility that it had come close!

I clicked on another one, my perverse curiosity driving me forward. This one had a bit more thought put into it. There was more buildup. It took its time getting to the lewd material. Honestly, I kind of liked it better than the first. Sometimes you have to delay the main hook of a song and rely on the building tension to make it better.

Regardless, when it did get there, my cheeks were flushed and I could feel a distinct burning between my legs.

Was I...getting turned on by this? What was wrong with me? I had agreed to help them hide their relationship for their protection, and not because I was secretly getting off on it! I wasn't that kind of pervert!

And yet, as the story described in lovingly crafted detail exactly how Len's tongue moved against Rin's sweet young pussy, and how she returned the favor by taking his stiff, throbbing dick deep into her mouth, I could not tear my eyes away. It was shameful. It was disgusting. It was morally offensive on every conceivable level. It was also happening right now in real life, and that made it the hottest thing I had ever read!

Again, I quickly clicked back to the list of stories and slumped back. My whole body was flushed with heat. What was wrong with me? I shouldn't be behaving this way! This was completely and utterly wrong!

Then why do you find it so arousing?

Shaking my head, I reached for the laptop to close the screen, hoping that would deliver me from temptation.

But then my eyes fell upon the story right under the one that had gotten me so flustered, and my heart just about skipped a beat.

Each story had three sets of tags. There were the characters appearing in the story, regardless of if they were involved in the relationship or not. Then there was the relationship or relationships that the story was focused on. And then there were the tags detailing exactly sort of acts they would be performing.

And this story stated that the central relationship would be Kagamine Rin/Kagamine Len/Hatsune...HATSUNE MIKU?!

ME?!

My jaw fell wide open. It couldn't be. I quickly scanned the tags. Oh, but it was. This story was about all three of us engaged in, well, in a threesome! It was about me having sex with both of the twins at the same time!

That...That could happen? That was a thing that people thought about?

Turn off the computer! my common sense practically screamed at me. This has gone too far! Turn off the computer!

I would like to say that I finally did the right thing and closed the browser, disconnected from the internet, and shut my laptop down, but let's face it: this was not the day for doing the smart thing. Almost as if it were moved by a will other than my own, I watched as the mouse's cursor traveled across the screen to click on the title.

And then I started reading.

It was clear that whoever had written this story wasn't interested in explaining how or why we had all ended up in the situation that they were describing. No time was wasted. It began in media-res, with my mouth wrapped around Len's penis while Rin watched and masturbated.

The sheer ridiculousness ought to have turned me away. I should have started laughing. I mean, what? How had this happened? Weren't they going to at least give the readers some hints of how this had all come to be?

And yet I did not stop reading.

The story was clearly not going for authenticity. It had us all talking like we were actors in a really bad porno. Even if by some bizarre twist of fate we did find ourselves in that situation, I'm pretty sure I wouldn't be asking Len over and over how much he liked my, and I quote, "Big fat tiddies," and quote!

And yet I did not stop reading.

I continued on as this questionably interpreted version of myself with a dirty mouth and substantially larger bust wrapped her breasts around the equally off-base version of Len's exaggeratedly large cock and started pumping the shaft.

It was so, so dumb, and so offensively degenerate to the point of outright parody. And yet I couldn't stop reading! It was like I was in a trance!

And all through it all, the itch between my legs got hotter and hotter.

I'm not sure exactly when my hand started to move toward my lap, or when it had slipped down past the waistband of my skirt. I only knew that, as I read about this alternate version of Miku sliding her fingers over Rin's pussy, fingers were now sliding over my own panties, tracing the contours of my sensitive mound.

The shock of realization brought me to a breathless stop. There I was, indulging in an act of extreme narcissism and about to masturbate to it. How had it come to this?

And why wasn't I stopping?

The butterflies fluttering through my stomach had multiplied into a swarm. Biting down on my lower lip, I cast an eye over my shoulder at the stairs while removing one earbud.

The groaning and squeaking were even louder.

Shivering, I stuck the earbud back in and turned my attention back to the laptop screen and the degeneracy that it displayed. I still had my hand down my skirt. If ever there was a last chance to turn back, then it surely had to be now.

Oh, dang it all, came the frustrated response. I'm in too deep already.

I know this whole situation must have shattered so many illusions about my supposed "purity," but the truth is that I already had learned my way around my own sex long before any of this had started. Look, the life we lead is stressful enough as it is, and sometimes a quick bout of self-love before an interview or after a particularly long recording session means the difference between being able to function or not. It's not always the most satisfying experience, usually just a quick session in my room or even a bathroom stall just to get it out of my system, but it did the job.

This was different. This time I was going to enjoy it.

Forget rubbing myself over my panties. My hand plunged into my underwear, and I had to bite down to strangle the cry that threatened to break out as the sensitive nerves flared up. And then I kept reading.

Now I was caught between both Len and Rin, Len grasping me by the ass while he pounded into me from behind and Rin holding onto my head as I ate her out. With two fingers I massaged the moistening lips of my puffy labia while imagining how it would feel to have Len thrust into me like that and how Rin must taste.

Now Rin was the one eating me out. I was sitting on her face, crying out while her tongue swirled around my pussy, as Len fucked his sister right in front of me. My burning sex was now aching to be touched, and I indulged it. The tip of my middle finger probed around until it found my pussy's wet, hot entrance, and I slid fully inside myself.

The perverted fantasy went on, describing scene after scene of shameless debauchery, and I could do nothing but come along for the ride, fingerings thrusting and pumping as that burning ache grew and grew, a rising wave that was going to crest at any moment.

The wave broke, and I could not stop myself from crying out as shameful pleasure overwhelmed me. Hot arousal squirted around my fingers, while my inner walls squeezed down on them like a vice. I was cumming harder than I ever had before, lost in a fantasy of unforgiveable obscenity.

And it felt wonderful!

I just kept on cumming and cumming, caught up in the throes of an orgasm greater than I ever could have imagined. Was this how it felt to just give in to those lewd impulses? Was this what Rin and Len experienced every time that they had sex? Was this how Lily felt all the time? If so, no wonder they kept things up despite all indications that they should stop!

But all good things must come to an end. I finally started to calm down as my muscles relaxed, releasing my fingers. My heart was pounding, my thoughts dissolved into bliss, and I felt more tired and yet more satisfied than I could ever recall being. I slowly withdrew my hand from my skirt and stared hazily at the glistening strands of moisture.

It was then that the full ramifications of what I had just did hit me. My chest seized up, and I started hyperventilating. Why? Why had I done that? I just masturbated on the couch to…to…

Dear God, what was wrong with me?

I admit, I panicked a little. I bolted off of the couch and washed myself in the kitchen sink, scrubbing my fingers with soap and water so hard that I turned the skin pink. Then I turned and saw, to my horror, small droplets of my own arousal gleaming on the linoleum floor.

Out came the disinfectant and the sponges. I wiped down the floor, and then the living room carpet. After that came the couch cushions, which, to my further distress, had a prominent dark spot from all the moisture.

Cursing myself for my foolishness degeneracy, I set to work, scrubbing away the evidence. As I did, I felt something trickle down my leg.

Darn it, darn it, darn it, darn it! I was still leaking! And what was more, changing would require going upstairs, which not only risked leaving more droplets of cum all over the house, but also going past where the twins were currently having sex!

"Good job, Miku," I groused as I shimmied my way toward one of the downstairs bathrooms, keeping one hand over my groin as I went. "You've gone and stepped in it now!"

I hastily shut the door and pulled my sodden panties off. Ugh. Maybe could I could wash them off in the sink and blow-dry them? Maybe I could scrounge up a used pair in the laundry room to use until they finished up?

I wet a handful of toilet paper and carefully wiped myself down. As I did, I caught sight of my face in the mirror over the sink.

My face was flushed bright pink, my eyes watering, and there was a little sliver of drool trickling out of one corner of my mouth. I was panting heavily, my breathing shuddering on every inhale, while my heart thumped away like a repeating snare drum.

I was a mess. I was a shameful, perverted mess. After all the hard work that had gone into building my image, here I was, masturbating on the living room couch to the thought of being double-teamed by the twins, while actively helping them carry out their incestuous affair! What had happened to me? How did I let myself get caught up in this?

Sniffling, I moistened a washcloth and carefully wiped down my face. I needed to be better. I needed to be above this. Rin and Len had their reasons for doing what they were doing, but I couldn't allow myself to fall to that level.

But oh God, I wanted them! I wanted them both! There was no denying it now. My body craved their sweet caresses and gentle kisses, and just the thought of them ignited a burning fire of lust in my loins.

Groaning, I slumped over the sink. What was happening to me? How had I gotten myself caught up in this?

Steady, Miku. You've conquered your fears in the past. You've performed for hours in front of thousands of people right after having a panic attack. Get a grip right now.

Right. A grip. I could get a grip.

Closing my eyes, I ran through every little trick that I used to calm myself before concerts. Counting backwards, clearing my mind, concentrating on my breathing, anything to get a handle on my nerves. When I felt I had regained control, I set to work methodically cleaning myself up and straightening myself out. I wrung out my panties and tidied the bathroom up.

Now composed, centered, and relaxed, I opened the door to the bathroom and walked out.

Rin and Len were both there.

They had finished up, redressed, and come back downstairs. They were huddled right in front of the couch, which had set the stage for the single most shameful thing I had ever done only a few minutes prior. To be specific, they were hunched over, staring down at my laptop, which I had set on the tea table before rushing to go grab the stuff I needed for cleanup.

Set there, and left on.

With my browser still open to that story.

I came to a sudden stop as my newly regained composure melted way beneath the growing horror of realization that was now building within me.

They knew.

…

Rin's soft lips taste so sweet against mine. No wonder her brother likes to call her Sugar. She giggles as she tenderly cups my cheek and presses in.

Behind me, her brother is taking full advantage of the situation to run his hands over both of our bodies. As Rin and I continue our good-morning kiss, one of Len's strong hands comes up between us to caress our stomachs and paw at our breasts, while the other is reaching over to grab a great big handful of his twin's ass.

"You know," he murmurs as he plants soft kisses up and down the back of my neck. "All things considered, I'd say things really worked out. I like this."

Moving away from Rin's mouth, I turn my head just enough to shoot him a wry look over my shoulder. "I bet you do," I say. "You big perv."

"You're the one to talk," Rin retorts. The hand on my cheek slides down to roam teasingly around my mouth. "Didn't this all get started because you were reading smut about the three of us on the couch? While masturbating?"

"No, it all got started because you two got a sudden burst of inspiration from catching me reading smut about the three of us while masturbating," was my response. "Or did you forget whose scheme it was that got us here?"

"And aren't you glad we did?" Len said as he leans in to capture my mouth with his own.

Yeah, I think as we kiss. Yeah, I am.