HEY. Thanks for giving this a chance, perv. Not to call a pot black or anything. I mean, I wrote the damn thing.

I've been wanting to write futa for a long time, and thought I might as well go big or go home. Enjoy!


Fuck.

This was the third set of sheets this week I had woken up to find ruined. The third time this week, and it was Wednesday. Fuck. I glared at the ceiling and felt the stiffness of drying cum in my underwear and on my sheets.

I sighed deeply and got up. I stripped the bed and myself and balled it all up. I showered and dressed in my school uniform, making it downstairs in time to have my sister send me a disapproving look as I sat at the kitchen table.

"Bacon?" I raised an eyebrow. "Since when did you discover the west, Sats?"

My sister put the dirty dish in the sink and sat at her tea with a roll of her eyes, a smile twitching her mouth.

"Since I got sick of throwing out the natto you don't eat every other morning," she deadpanned.

I inhaled hot coffee and coughed, perfectly lady-like. Satsuki smirked at me, her stormy blue eyes dancing. Her fingers twirled a pen and she let me choke in peace, thinking of something to write down.

Watching her nimble fingers reminded me of the dream I had last night, and I scowled, thinking of the aftermath of that particular dream. My scowl lasted well into breakfast, and delightfully extended to the car ride to school. Satsuki apparently could tell I wasn't in the mood this morning, because she let my funk continue without interruption, only telling me to have a good day at school and to keep my phone on.

'Stay awake'

Wow, maybe I might turn my phone off after all.

'Bite me.' I replied to her.

'Don't text in class.'

I growled at her hypocrisy.

Satsuki, only a year older than my freshman self, was already on the student council, and everyone thought she was shoeing for president next year. Personally, I sincerely hoped not. Sats already walked around like she had the biggest dick on campus, with an even larger pole shoved up her ass. At school, my sister was a walking bundle of nerves.

School was boring as hell, made more bearable by my best friend Mako. But even then, the day let out eventually. The ride home was even quieter than this morning, but this time it was Satsuki's fault. I tapped my fingers against my leg and tried to figure out what might have come up.

The radio fizzled and played shitty pop songs, and I fiddled with it enough for Satsuki to break out of her thoughts to tell me to knock it off. We got back home before I had a hypothesis, so I let it go.

A few hours later, Sats knocked on my door softly and asked if I was busy.

"Nah," I shrugged, gesturing to my game system across from my bed. She nodded her dark head, grimace in place. "What's up?" I asked.

"Room for a party of one?" she tried, cracking a smile.

I laughed and patted the space on the bed next to me.

"Right this way, ma'am," I grinned, pausing my game and making a silly, grand gesture. My sister and I were fucking dorks when we were alone, a trade secret that we both would take to the grave.

Satsuki stretched out on my bed, relaxing, and I unpaused my game. I had changed out of my uniform into a tank and sweats, and Sats had donned a soft cotton tshirt and running shorts.

"Fucker," I murmured acidly to the screen. Satsuki laughed at me.

"Ryuuko, three o clock!" she shouted. I quickly took the camper out and laughed manically. She helped me kill some baddies for a while, and the feel of the room helped us both unwind. After my team had won the game, I muted the menu screen and looked at my sister expectantly.

"So what's wrong?" I asked bluntly. Satsuki raised an eyebrow and dodged neatly.

"Nothing,"

"Wow, that was smooth, Sis." I ground out, unimpressed. She smiles at me charmingly.

"Why haven't you put new sheets on your bed?" she challenges, and I know I just lost the game. My face instantly flamed, and I looked away from her.

"I did," I mumble.

"Are they invisible sheets?"

I grimace and came clean… so to speak.

"I had to take them off again,"

A pause, and then it clicks.

"Oh, Ryuuko," Satsuki groaned lightly, a hand to her face.

"I can't help it!" I explode self-consciously.

"This is the third time!"

"I know that!" I threw myself backwards to lie down next to Satsuki, covering my face with my hands. She let me wallow in my mortification. I groaned and looked at her.

"Don't you do it?"

She pursed her lips, her blue eyes drilling into me meaningfully.

"I used to,"

I paused.

"Okay, how'd you make it stop?"

Satsuki raised and eyebrow and make a vague hand gesture. I frowned.

"I don't speak sign language, crazy."

"I masturbate, Ryuuko."

"Oh…. Oh."

Satsuki sighed deeply and I saw out of the corner of my eye that her cheeks were a little flushed. I cleared my throat.

"I mean, it's not like, ya know, I don't," I started self consciously, "But… uh," My courage failed and I stopped. Satsuki turned her black hair to look at me.

"But what?"

I kept staring at the ceiling. This was humiliating.

"Nothing," I grunted.

My sister poked me.

"Hey, it's fine. Just tell me," she prods gently, her eyes soft and caring.

I grimace.

"You're not allowed to make fun of me."

"I wouldn't."

"You would."

"I'm not Nonon, Ryuuko."

"Well, that's because Nonon is a fucking bitch,"

"Ryuuko."

"Okay, okay!" I huff. Here goes my dignity. "I.. ItrytodoitbutIcantcome."

Satsuki pauses, "I don't speak gibberish, crazy." She teases me back. I huff loudly.

"I try to masturbate, but I can't come!" I shout, my face on fire. My sister is quiet for a long moment after that, and I have to see if she's silently laughing at me or not.

Satsuki looks deep in thought, on the contrary. Relief fills my heart.

"Ever?" Is all she asks, and I love my sister for not making me feel like a freak for this.

"No, I have before," I tell her. The Call of Duty screen plays over silently in the background.

"Do you remember what you were thinking about when you did?"

"Uh, yeah…"

Shit.

"What was it?"

"I'm not fucking telling you that!"

Because it was you. Yeah, I had accidentally masturbated and gotten off to mental pictures of my full-blood related older sister. I'm pretty fucked up.

"Okay, okay, relax, Ryuuko." She calmed out. I breathed, losing more dignity by the millisecond. "Are you sure you're… doing it right?"

"How do you fuck that up?" I burst out, grumpy.

"I don't know!" Satsuki argues, "I just want to make sure!"

"You wanna know so bad?"

"I'm just trying to see or not!" She replied, stagnant.

"You want to see?" I argue, heated.

"Sure." Satsuki glares.

I pause.

"Wait, what?"

"Show me," she says easily, relaxing into my pillows once more.

"Seriously?" I reply. My heartbeat starts to pick up. Is this real? My sister shrugs at me.

"If you want to,"

Instantly, I'm horny. It's not something I can help. But all the blood in my body starts to circulate through my crotch, and I can't look away from Satsuki's piercing gaze. My mouth dries out, and all the liquid transfers down south.

My hand twitches, and I feel myself reach for my junk.

"O-okay," I rasp out. Satsuki smiles, totally calm. "I dunno, Sats- I feel kind weird," I tell her, my fingers brushing the growing tent in my sweats. "Just doing it myself." I look at her, then, and swallow for luck. "You could join me?"

She doesn't look away from me, but the smile on her face dims a little. She swallows, too, and nods lightly.

Holy fuck, this is happening.

I nod, turn my table light on, and get up to turn my overhead light off. The room gains a little ambiance, and I shut and lock my door. Our father was out of town, and would be for another week, but it felt right.

When I look back to my sister, she's shimmied out of her shorts, and is cupping her crotch. I swallow, my eyes lingering over her hands. She raises an eyebrow and I smile a little.

"Come on, Ryuuko," she whispers out evenly, and I feel myself relaxing ever so slightly. I tug on my sweatpants gingerly, before just breathing deeply and stripping them off entirely.

"Wow," Satsuki says, her eyes studying my semi-solid penis. I shifted from foot to foot.

"What?"

She smiles at me.

"You're very thick,"

I laugh and practically feel my ego swelling. Oh, wait. No, that's just my dick. Satsuki laughs lightly, and lets her hands fall away as I get closer to her. My mouth drops.

My sister is large. Probably eight solid inches, and her dick puts my six inches to shame. Well, sort of. She was right; I am thick. I can't wrap my middle and thumb fingers around my dick and touch. But Satsuki's hung like a horse, and her dick is gorgeous.

But I keep that thought to myself. God, it was disturbing how attractive I found Satsuki. She's also fully erect, and I grinned a little. My sister was turned on. Which was an awesome sign for me. I joined her on the bed, and laughed.

"So, this totally isn't weird, right?" I smirked.

"Of course not," she replied sarcastically. "So, show me."

"God, is it all business with you?" I complained. She grinned at me.

"Actually, I'd call this pleasure."

I scoffed. "I can't believe you just went there." And I reached for my dick. I knew what kind of pressure I liked, so I got right down to it. I massaged my tip, and the underside, and sort of supported my shaft with my other hand. I shut my eyes and tried to zone out.

"No."

My eyes snapped open, and I looked at my sister. She was fucking masturbating! I mean, I know I was too, but I just – shit, I was hard.

"No?" I restated, borderline irritated.

"No." She confirmed, always in the right. I frowned at her pushiness. "Look what I'm doing, Ryuuko." She ordered me. Her tone set my teeth on edge.

"That's exactly what I'm doing!"

She scoffed.

"No, it's not."

"Yeah it is!"

"If you were doing this, you'd be coming, little sister."

Her reminder at the fact that she was my older sister sent a flame of arousal into my lower stomach, and my dick tightened even further.

"You think you know what could get me off?" I challenged.

"Of course," she sneered at me.

"Then do it!" I dismissed.

"I-" She hesitated. "What?"

I swallowed. Shit. Too late now. I just… I wanted so badly to touch her. For her to touch me. Satsuki..

"If you think you're so good, get me off."

Satsuki propped herself up on the bed slowly, her blue eyes boring into mine, and I let her see whatever it is she wanted to see. Then, I felt a warm, warm hand grip the shaft of my dick and slowly pull.

"Okay, Ryuuko," she said softly. I swallowed, and watched as my graceful older sister shifted to lie on her stomach between my legs so she could have both hands free. She leaned over, and at first I thought she was actually going to put my dick in her mouth, but she instead let a trail of spit spill from her lips onto the head of my dick.

I almost came right then.

Then, she took one hand and spread her palm over the tip, and soon my precum had made it slick as hell. Her shoulders muscles flexed as she jerked me off, and it was so incredibly sexy. Satsuki's other had joined in, and she multitasked, one pumping my shaft, the other massaging the head of my cock.

I had forgotten to stifle the moans ripping their way out of my chest. Satsuki had been right. I was going to come. My breaths were starting to labor, and she didn't look away from my face, her hand pumping steadily. She started to gain speed and twisted her wrist expertly; a kind of corkscrew turning that sent my brain on shutdown.

I stared into her blue eyes, and there was something I needed. Something right in reach, and if I got it, I'd be done. What the fuck was it? God, I needed to come so badly.

"Sat- Satsuki?" I groaned out, and my sister smirked at me.

"Yes, Imouto?" she purred. That was it!

"Holy fuck, keep talking," I practically shouted. "God, I'm so close,"

Satsuki's low voice seemingly reached my ears and dick simultaneously,

"Ryuuko, I've got to come clean… I've been thinking of being with you like this for a long time, now," her voice was the gorgeous contralto I listened to while she was singing in the shower, and thinking of her wet and naked..

"I'm sorry, Imouto. I don't mean to take advantage of you-"

I came.

Satsuki's hand was covered in semen as I finished jerking into it, and I panted hard, looking at her alertly. Her words finally caught up with me.

"Really?" I blurted out.

Satsuki chided me.

"You're really supposed to say when you're about to come," she responded crisply. I rolled my eyes at her.

"Satsuki," I said clearly. "Did you mean that?" I stared at her intensely, looking between each of her eyes. The same irises I had. My full-blooded sister.

"Yes," that sister whispered. "I know it's wrong," she said, trying and failing to look away from my no doubt piercing gaze. "But I can't seem to stop thinking about it. I understand if you don't-"

"Fuck me," I hushed out.

"Pardon?"

I swallowed, looking into my sister's stunned and beautiful face.

"You're my sister, Sats, and I- I think about you like that too, sometimes." I looked away from her. I still had a raging boner, and the picture was really odd. "I can't help it. I have wet dreams about you, and- this is literally a dream come true," I rolled my eyes when she smirked at the double entendre.

"So…" I looked at her. "I want you to fuck me." My face burned and burned and burned. "Please,"

"Ryuuko," Satsuki said softly, gently. I swallowed, not looking at her. "Okay," she replied.

I fixed her with a serious look.

"Really?"

"Yes."

I gaped at her, my brain short-circuiting.

"Do you have a condom?" Is what my brilliant mind came up with. Satsuki laughed, and I cracked a smile at the broken tension.

"Yes," she said easily. "Wait here," and she left my room.

I flopped on the bed.

Holy shit.

HOLY SHIT.

Holy. Shit.

I'm going to have sex with my sister. My unbelievably hot, perfect, hung, sister. My stomach tumbled in a tumultuous firework of emotions. I was relieved to figure out that most of them were from excitement. Satsuki was my sister, my most important person.

Wait, why does Satsuki have condoms?

My sister re-entered my room and shut the door. I glared at her and she looked curious.

"What have I done?" she blanded out.

"Why the fuck do you have condoms?" I asked angrily.

She laughed at me.

"Relax, little sister, they were a gag gift from my friends. Their little way of saying they accepted my 'abnormality'."

I growled.

"Nonon probably just wants in your pants."

Satsuki smirked and I scowled.

"Why do I like you again?"

My sister laughed aloud.

"Because I can make you come?"

"Oh yeah," I replied, smiling. We both chuckled, and then the moment of truth was upon us. I looked at Satsuki, and she looked back at me gently.

"Ryuuko," she started, climbing onto the bed. I sat up slightly. She reached out to cup my face, and my cheeks heated, "Will this be your first time?"

I bit my lip and nodded lightly.

"I've never kept anything from ya, Sats."

She smiled.

"And you're sure you want… me?"

I snorted, and ducked my head into the curve of her hand.

"Yeah."

Her smile was absolutely genuine. Nothing like the cruel, barely-there smirks of school, and not exactly the ones to humor me around the house. Her smile was full of… joy.

And then she kissed me. Kissing Satsuki was so soft and warm, and I knew that this kiss was exactly how having sex with her would be. Slowly passionate and careful. But building up to something wild and electrifying.

She rolled me on my back, and we continued to kiss easily. Her tongue and my tongue got lost in each other, and the rest of our clothes traveled the same path.

"Jesus," I whispered.

"What?" she smiled lightly, breathing elevated. I kissed her and stroked my hands over her curves.

"Your tits are just as proportionate as your dick."

Satsuki laughed at me and toyed with my hair as she suckled on my chest, and I hiccupped a laugh. Our skin slid so smoothly together, and I started to ache, deep in my stomach.

"Sats?"

"Hm?" She answered, busy with nibbling my ear and throat. I skimmed her ass, and gripped her hips, getting her to focus. She did.

"I'm ready," I whispered. Her blue eyes flattened in lust, and she didn't ask me if I was sure. She just stared at me. I nodded, and she rolled away, grabbing for the box of condoms on the nightstand.

Satsuki quickly extracted one, and I felt my own dick throb with need. More persistent, was the pulsating of my vagina, and I briefly worried about Satsuki's size. But I breathed, trusting my sister.

Her perfect teeth ripped a condom open, and I smirked.

"That's fucking hot," I commented idly.

She smiled as she carefully rolled the protection over her length, and it shone lightly with lube. Aw. How considerate of her. The constrictive rubber gripped my sister tightly, and I frowned in sympathy.

She mounted on top of me, and before I could get nervous, she kissed me deeply. I sighed into it and allowed myself to relax.

I was ready for this.

If it was Satsuki, I was ready for this.

Her cock bumped mine, and I knew I had to start right now, or I wasn't going to make it. I kissed my sister with finality, and she took the hint. Satsuki lifted off of me and I spread my legs for her. I could feel the cool air hit my vagina, and I knew I had to be soaking wet.

"Here," she murmured, hands on my thighs, "Scoot up,"

I shoved up the bed, my back resting on some pillows so I could see what was going on. Satsuki crawled to meet me, and she pushed my legs farther apart, sitting on her heels.

"Ready?" she murmured, her eyes flat with lust and focus. I nodded, "Tell me right away to stop if I hurt you, Imouto, okay?"

I shivered.

"Okay,"

She positioned her dick at my vagina, and I held my smaller cock flat against my stomach. The head slipped through my folds the first and second push, but the third one found its way through.

Losing my virginity was not as bad as some girls make it out to be. They'd had me convinced it was the equivalent of shoving a lit match up your hoo-ha. But honestly? It was a brief, sharp pain, and then it was over.

I smiled as soon as it passed, but Satsuki's face had drawn, and she bit her lip.

"Ryuuko, there's blood," she said, worriedly.

I sort of smirked. It was an interesting turn of events, but Satsuki had always been a worrier.

"Nee-san," I quieted out, and I felt Satsuki's dick throb, "Keep going."

Fuck, Satsuki was big.

I whined and mewled like a kitten, but my sister pushed slowly and deliberately. Half-way through she stopped and panted heavily, and I knew my inner walls were spasming, trying to adjust. Eventually, I had all eight inches of Satsuki inside of me.

It was fucking incredible. I was so… full. I'd never had something inside me, and the fact that it was my sister made my blood boil. I was panting, and my dick was straining. I grabbed Satsuki by the hair and kissed her as hard as I could.

She felt perfect inside of me. My body was trying to adjust, but I honestly never wanted her to pull out. A thought dawned on me then, and I broke away from the kiss to rasp,

"Nee-san, take the condom off,"

Satsuki looked at me colorfully, but she searched my face and kissed me again. So slowly I couldn't tell what was happening at first, she pulled out of me slickly.

When she was out, I knew I was right. I loved my sister inside of me, and I was going to get addicted to the feeling. Satsuki pulled the rubber off her impressive length, and it bounced free and hard as granite. The head of her penis shone, swollen and needy. Once again, she parted my folds and slid inside me.

It was a lot easier the second time, but it was made absolutely perfect when Satsuki's low gasp sounded in my ear. Her body shivered, and she whispered to me.

"Ryuuko, you're so hot and wet. So warm," Her voice was a desperate, wild rasp, and I felt my own precum slip over my dick.

I wrapped a fist in her long black locks.

"You can't knock me up, right?"

She shook her head.

"The chances are incredibly low,"

I sighed, and shivered when the cock inside me throbbed. I gasped.

"Are you alright?" she asked immediately.

"Nee-san," I moaned. "Move,"

Satsuki did. She started to gently roll her hips. Not even pulling out and back in, just a simple inch of leeway in and out, in a perfect circular motion. I loved every second of it. When I got used to the rhythm, she started to pull out a little bit more on every back thrust.

Soon, a soft slapping of skin on skin was heard, and I smiled. God, this was perfect. Satsuki apparently assumed that my body was ready enough, because she picked up the pace. I smiled. Not only did this feel amazing, but it was happening. I was having sex. With my sister.

She set a perfect, fluid rhythm. Two beats to pull out, one to slide back in. The draw was smoother than a bow, and the punctuation was the right amount of firm. And I felt everything.

"Faster, Nee-san," I begged, and Satsuki obliged, tightening her grip on the sheets on either side of me. A stead pounding started up, and I was bordering on understanding what girls meant when they said when they saw starts.

She straightened up, lifted my legs, and wrapped them around her waist, still moving in and out of me. Her hold was on my calves, and I was 30 seconds away from coming. Satsuki's abs flexed every stroke, and her dick was just so perfectly big.

Sats groaned deep in her chest.

"Ryuuko, your pussy-" she huffed. "It feels so, so good."

I wrapped my legs all the way around Satsuki's waist, and sat up to hug her neck, and she leaned forward to rest her hands on the mattress again, picking up speed.

"I'm going to cum," I rasped out.

"Fuck," Satsuki kept flaring her hips in perfect time. "I'm going to cum inside you, Ryuuko."

"God, Sat- Satsuki."

She panted in my ear.

"Do that again," she wined lowly. "Say my name, Imouto,"

I gasped.

"Satsuki,"

"No," she grunted, sweat beading her forehead, "Tell me who you love, honey,"

Satsuki Kiryuuin was about to give me the best orgasm of my life and I was going to let her know who gave it to me.

"Nee- ah! – Nee-san!" I cried, panting and howling as her speed increased, pulling full out and slamming back in quickly. "Fuck, NeesanNeesanNeesan! Keepgoing, Onee! Please, more! Nee-SAMA!"

I felt a hot spurting inside of me, and Satsuki went rigid once, twice, three times, and I shivered, my climax absolutely rippling up and down my spine, my voice losing itself from my control.

I honestly think I might have blacked out.

I came down slowly, and Satsuki had lain completely on top of me, holding me against her firmly. A final shiver from my sister, and I felt one last hot jet of cum paint the inside of me.

"God, Ryuuko, you feel so good," Satsuki moaned, and my internal muscles clenched to find she was still hard inside of me. She shivered from the roll of my flexing, and I put a hand through her hair, and one on her muscular back.

I laid a kiss on the side of her head.

"Go again, Sats," I breathed, and my older sister didn't wait for me to tell her twice. Her long legs didn't pull out as she rolled my hips up, her quads pressing into my hamstrings, feet on the bed. Her hands planted by my head and when she moved, her thrusts were almost animalistic.

Inky black hair spilled down her front, and I reached up to gather the strands and held on for dear life. Her dick slammed into the tight channel of my body with all her weight behind it, and my breaths outward started to pitch upward as she hit a spot deep inside me. It felt like she was basically inside of my cervix, she was so deep.

I was in heaven.

Vaguely, between my breathy screams of pleasure, I noticed the bed squeaking like mad, Satsuki's violent double-timed rhythm sending my bed springs into a cacophony. But in the moment, I was distracted. My ankles were locked high on Satsuki's back, and she was absolutely going to town on me.

God, it felt so good.

"Ryuuko," she keened deeply, and we'd been having sex for all of 40 minutes, and I knew from her face that she was going to come soon. I dragged her head down to my mouth, and wondered vaguely if my sister shared my fetish for dirty talk.

Either way, I'd better hurry, if she didn't come soon, I was going to.

"Nee-sama," I begged her, my voice breaking in the rhythm she was fucking me in, "ah – Nee-sama, cum inside me," Satsuki whimpered and started to thrust in a frenzy, her eight inches being swallowed inside me again and again. I was just saying whatever came to my mind now.

"Fill your little sister with cum," it was all sorts of broken, but Satsuki got the message. She practically howled and bit down to kiss my shoulder.

"Take my cum," she grunted savagely, "Take it,"

Satsuki's low, animalistic voice combined with her perfect dick, hit just the right spot, and I came, ejaculating all over my stomach and chest. She came seconds later, my vagina already full of sperm, positively overflowing. The angle let me watch as cum leaked out, over even Satsuki's penis.

When she pulled out, it was with a satisfying squelch and a low, pulling sensation that left me feeling empty inside. I whimpered, and I felt the bed dip as my sister laid next to me, pulling me back into her arms.

She cooed into my ear, and asked me over and over again if I was all right, kissing my shoulders and neck. I flipped and cuddled into her embrace, nodded tiredly.

I just lost my virginity to my older sister.

We laid together, cuddling and sated for long moments of drowsy contentment.

"Satsuki," I rumbled lowly, and she hummed. "That was wrong, wasn't it?"

Her body stiffened, and I immediately backtracked.

"I just mean it's not ya know, something we should tell dad about, right?"

She had opened her eyes and stared over my head, and I felt bad. Satsuki had been so sweet and patient, and I had gone and made her feel wrong. She had been so good, more than good; she had been fucking amazing. And now her warm arms had turned to frozen stone.

"No, I suppose you're right," she said slowly, her voice taking on the professional tone of consideration I hated. "We should forget this happened. I'm sorry, Ryuuko."

By the end of her speech, she had extracted herself from my limbs, and stood from the bed. I laid in shock as my sister collected her clothes and crossed to the door.

"Wait, Satsuki! I didn't mean-"

The door shut.

Fuck.


There you have it, pervs. I loved writing this, because I'm sick in the head. My vision for this could possibly be multi-chapter, but the plot is thinner than water.

Let me know what you think! Any ideas are welcome.

With Love,

Konstantine