It's that time again where we ask ourselves "what depraved plot has Sir Sleeps-a-lot come up with?", as I'm back, bitches!

Welcome back to The Lesson They Won't Forget. Thanks as always for coming to read this story. I really appreciate that.

There isn't much worth talking about as a summary here... this happened, this happened, and this happened, and now we're here - here being, Yui's turn in the curtained room with Keima.

I hope that you enjoy this chapter then :)


"S-so," Keima asked her as she was looking through her phone, "h-how are you doing, Yui?"

"I'm alright," Yui smiled, "although you don't have to worry about making small talk… I'm just getting my playlist ready."

Keima felt his stomach sink a little. Not to say that he was much of a conversationalist, but he really wouldn't know what girls wanted unless they communicated it to him. Having to talk over music was going to be troublesome.

"Err… though before you start that, can you tell me what you want to do in this session?" he glanced at the toys on the table, "especially because you have some… things…"

"Oh yeah," Yui laughed, "it's just a vibrator and a dildo…" she said casually, as she expected those words to mean something to Keima, "I thought it might make things more fun in this lesson."

"Okayyy…" he stood up so he could get a better look at them, "so the dick-shaped thing is the… dildo, I guess…" she nodded, "then which is the vibrator and what does it do?"

"It's the egg," she explained, "as it vibrates, it just feels really good against sensitive parts of the body… the remote just lets you control the vibration speed and pattern."

Keima processed that information, feeling a bit better. So those were adult toys that could be used in masturbation, and he had a fair idea where it was supposed to get used if he did want to use it. He did have one question.

"Ok, I can see how this will spice things up," he agreed, "though I have a penis… what point would the dildo have here?"

Yui blushed, looking down at the table…

"I…" she hesitated, "I was hoping to try anal…" she said, her voice getting smaller and smaller. It was much easier to tell Mio, who was not the one making the decision.

"That's not going to happen," Keima said on no uncertain terms, "there is no way I am knowledgeable nor comfortable with putting a dick in anyone's butt on my first day of having sex!"

"W-what if it's in my butt?"

"I said anyone," Keima's eyes sharpened, "you can have your fantasies, but I'm drawing the line there."

"But I've tried it before," Yui insisted, "what if I did it to myself and you watched?" he shook his head, "but it feels really good… and I bought lube which will make it feel even better."

"Still a hard no from me," Keima dismissed it, "don't you have any more normal fantasies?"

"H-how about doggy style? Not in the butt, of course," Keima rolled his eyes.

"That's a bit better… still nothing any girl has asked me to try, but I could get behind it," Yui laughed at the unintentional pun but said nothing further. Keima took a breath, accepting his fate.

He'd seen that position in some eroges, but it always felt degrading to the girls, at least as he saw it... at least the dildo looked like it might be fun.

"Alright then… now I have the overview, how about we get started, and we'll get to it a bit later?"

Admittedly, he had his fingers crossed behind his back – he was a little worried to have that power which came from doggy style.

"Fine by me," Yui replied with a smile, "time to strip, Keima-kun."

Keima was a bit bemused as she undressed to her baby blue frilly bra and panty set… okay, so that was enough talking for now. He obliged and got down into his boxers, just making sure to keep his uniform far away from hers that they wouldn't be confused later.

"Okay, I just need to take the potion, then we can get to it," Keima explained as he moved closer. To his surprise, she blocked his access to the table.

"Let me get that for you," she responded, "how much is a serving?"

"One of those ladles," he answered, "though I can get it."

"I know," Yui laughed, "but I want to feed you instead, so you can get comfortable."

Keima was almost considering it, when it occurred to him what she wanted… he'd be at the bottom, and she was almost certainly climb on him. He was instantly on his guard.

Yeah, nope! Not risking that.

"Thanks, but no thanks," Keima said firmly, reaching out to put a hand on her shoulder, "it'll take a moment, so you can lie down."

"Aww, but I want to feed you," Yui ladled some of the potion and turned to face him. Keima, not expecting the motion and his hand pushing her shoulder harder than he'd anticipated, quickly reached for for the ladle with his mouth, somewhat succeeding.

Of course, he got about half the potion in his mouth, but the rest fell on Yui's upper body as she stumbled onto the bed under Keima's weight.

The ladle clattered to the floor.

"S-sorry…" Keima whispered on top of her, one hand on her arm, and the other on the bed.

"If you wanted to ravage me so soon, you could have asked," Yui laughed, but the sound died in her throat as Keima looked at her.

God, she looked gorgeous… her hair ribbon had loosened and fell out, so her long hair was fanned under her, and her tanned skin, spotted with green drops of potion, shifting as she breathed.

For all of Yui's tomboyish features, like her liking the boys uniform, and her wanting to set the pace concerning her relationship with Keima, she was definitely a girl... those averted eyes and her womanly curves... it put Keima at ease somewhat.

"Can't go wasting that potion, can I?" he leaned forward, and Yui gasped as she felt his tongue on her skin… first on her cheek… then on her chin, then on her chest and ribcage and flat stomach. Her hand grasped on the blanket as he began to lick more than the emerald drops on the swells of her chest visible above her bra.

Yui was conflicted. His mouth was soft and gentle as he soothed her skin, but she didn't want that. She didn't want his gentle love to reverse all the progress she'd made getting over him.

Keima, sensing some reluctance from her, turned to look at her pink face.

"C-can I kiss you?" he asked. She grabbed the back of his neck and pulled him into an open-mouthed kiss. He got the message instantly, bringing his tongue into her mouth and sparring hers with matching enthusiasm.

Making out was good… her brain was wiped clean of any thoughts, and her hand slid down his stomach into his boxers, finding his hardening cock and providing her own assistance. He groaned into her mouth, before pulling away a moment later.

"Fuck, if you knew how good that felt…" he caught his breath, but Yui slipped his boxer band behind his boner and continued to massage his appendage, "were you masturbating in my body when you were there?"

He was taken aback at how smoothly she'd done that. Being bold was one thing, but her hands weren't clumsy or shaking or anything.

Yui froze, her hand stopping as well.

"I-I wasn't," she blushed, "I only really tried masturbating for the first time after that ordeal."

That was the truth… with the kind of mother she had, and general lack of interest she had had towards sex before she'd met Keima, she hadn't even thought of touching herself like that when she was in his body.

Really, probably her knowledge was from the porn she'd watch on her phone late at night.

"W-what about you?" she laughed lightly, "did you feel what a girl's orgasm was like when you were controlling my body?"

"Not at all," Keima protested straight away, "I wasn't thinking about that at that time…" he averted his eyes, his cheek darkening, "and even if I was, I would never do anything like that without your permission."

"Heeeeh," Yui smirked, "I wouldn't have minded though… though if you asked me, I probably would have insisted that I help you."

Keima's face flushed scarlet as she winked.

Not good not good… he could feel his girlish personality creep in. And he was doing pretty good job keeping it down this far.

"It's too bad that we can't repeat the past now," she said softly, "but for now, my body is all yours, and you can treat it as you want…"

"So I can make sweet love to you?" Keima asked hopefully.

Yui blushed deep red. She looked away, taking a breath before turning to him.

"I'm more into you pounding my cunt with that dildo while I pump you till you cum all over my body," Keima was speechless for a long moment.

There was sexually liberated and wanting to explore kinks, but this kind of talk just worried him. Even if she'd gotten well acquainted with that dildo, wanting her first time with him to end with him cumming over her legs and stomach was… off.

She picked up his hesitation and didn't want him to think too much of it, moving her legs out from under him and hooking his boxers down with her toes easily, pulling it down to his knees.

"A-are you sure you want that?" Keima asked seriously, and she nodded.

This hadn't been what Keima had expected with this time, but who was he to deny a beautiful girl an orgasm that she wanted? He climbed off her to grab the dildo off the table, his legs shaking slightly.

"Erm… is there anything I need to make it easier for you?" he asked Yui, who paused for a moment before asking…

"P-please put a condom on it and some lube on it…" she said softly as her hand slipped into her panties, "although I probably am wet enough without it."

Keima nodded, following her instructions till the cock in his hand was slick and shiny. Even though he wasn't going to be inside her, there was a definite excitement of watching a dildo go in and out of her pussy while she played with him. He hissed, giving his dick a jerk with his hand as well.

He stood on his knees next to her, before yanking her underwear to her knees so he could watch her finger herself. The image did not disappoint… with three fingers all the way in her hairless vagina.

She pulled them out, strands of her juice clinging to them. Keima wasted no time, moving the dildo over her entrance.

"My god," he struggled out, "no wonder both girls and guys want to confess to you… if they knew how fucking gorgeous you look with your pussy out on display…" he groaned as Yui wrapped her cum coated hand around his cock, which was already slick because he had the foresight to use lube on himself as well.

Keima pushed the dildo deep into her in one shot, and she gasped, her hand tightening around him. He pulled it out, the black surface even shinier with her juices. He plunged it deep into her again, and her toes curled.

The two of them met eyes, and Yui began slowly pumping Keima's cock, with him matching the pace with the dildo in her.

He hadn't really expected to enjoy holding a firm silicon penis and using that to enter a girl, but it was quite enjoyable… he got a full view of her flesh parting as it went in and out of her, and her hands smoothly jerking him off… and above all, he really had a fair amount of control of his head, because they weren't on top of each other. Yes please! He navigated his other hand to her clit, rubbing the sensitive nub lightly as he could feel her approaching.

Even though he couldn't feel her pussy tightening firsthand, her core was radiating heat, and the dildo wouldn't move as easily. He let go of her for a moment to grab a pillow to support her lower back before pulling the dildo out and shoving it sideway, reaching into her at a different angle. That seemed to have done something, as her moans became even more girlish. He suddenly shivered as her second hand slipped between his legs. He almost buckled as a new sensation coursed through his body, unlike what any orgasm had given him. He let out a higher pitched moan as he finished, taking her along with him.

His legs were quivering as he viewed the scene below him… the dildo slipped out of her with a delicious noise, and her sweating body heaved as she tried to catch her breath… his eyes trailed down to the spattering of cum on her belly and lower… Oh shit!

He quickly grabbed a tissue and wiped off the spots which were too close to her entrance, a little freaked out. Sperm could swim really fast and Yui's mum would wipe him off the face of the earth if she got pregnant.

Actually, scratch that – the Goido matriarchy would kill him, regardless.

"Y-you really don't have to worry that much," Yui laughed, "it was all outside."

"I-it was, but…" he looked at Yui, who had a gentle smile on her face.

"Thank you for caring," her voice had a bit of a sad edge to it, which she shook off, "this was really amazing."

"You said it," Keima agreed, "I have no clue how you touched me in the end, but I've never come like that before," Yui laughed.

"That one will be my little secret," Yui's hand twitched on the bed near Keima's, who slid his hand into hers with no hesitation.

Admittedly, this had probably gone the best that Keima would have expected with a girl like Yui, but he felt that he'd copped out a little… normally there was a lot more contact and general romantic behaviour, but he'd kinda forgotten…

"That was fun, hey," Yui nearly sat up, before realising that Keima had pulled himself next to her, one arm draped over her rib.

"You were really amazing, Yui," Keima admitted as he snuggled up closer to her, "I'm glad we have a few more minutes to just relax and talk."

Before, Yui would have fallen for that, hook line and sinker, but she really didn't want to do this… her heart was already in a sensitive enough place without him being sweet enough to melt her.

At the same time, she wished that it could stay like this forever… gentle kisses and reflecting on the time past… just, he was the last person she wanted this conversation with.

She really didn't need another reason to fall in love with him again.

'AND WHY NOT?' A familiar voice spoke to Yui, 'now is the perfect time to tell him that you're in love with him.'

Yui ignored that voice. Keima leaned close to give her a gentle kiss, but she held up a finger.

"W-we can talk anytime," she responded, "can we maybe go for another round before the time is up?" Keima laughed, climbing back to his knees.

"Should have seen that one coming," he shrugged, "it's too bad… we never even got to discuss the fact that this wasn't the first time we saw each other naked."

"Oh yeah, I guess that's true," Yui smiled, "although I was too much of a goodie-two-shoes to take advantage of that time…"

"It was pretty much the same for me," he reached over to the table and picked up the vibrator, "so even though this isn't the first time I've seen you naked, it's definitely the first time I'd imagine giving you a mind-blowing orgasm with this."

He climbed in between her legs and leant over her, one hand sliding up her stomach, and Yui blushed.

Keima paused on his route as he took the scene in… he was always a little annoyed about how she never fit his image of a heroine… she was always the one to pursue him and cling onto him, which always seemed to break his brain, but watching her lying there, face red and eyes averted – the only motion was her blinking and her chest rising with each gentle breath.

"You're really beautiful, you know that?" he whispered, his hand cupping her cheek and turning her face towards him, "I'm happy to see a girl who knows what she wants, so…" his finger slipped into her wet folds, and her eyes widened, "I'll do my best to give you the kind of orgasm that you want."

Yui could feel her heart beating out of her chest, her head and heart screaming of conflicting emotions.

He wasn't hers, but why was he speaking like that? She wanted his soft touch, even though that was the worst thing for her… he seemed pretty damn focussed on appreciating her and her body, and she loved it.

He was supposed to fuck her, goddamn it!

'Why don't you be honest then?' Mars spoke within her, 'just because you dress like a boy, doesn't mean that you can't be his girl?'

He's just doing it to be nice… to make her first time feel special… there wasn't anything more to it. She wasn't able to resist him this time as he softly kissed her, fingers softly massaging her clit.

'Just tell him, Yui. I can feel it overflowing from you.'

"Don't be gentle," Yui spoke as soon as their lips parted, "I want you to fuck me… nothing more."

Keima hesitated as he processed that. He didn't even get a millisecond before Yui's body began to glow.

"I will not be ignored," a loud voice filled the room and Keima scrambled to his knees between her legs, just in time for a white being to exit out of Yui's upper body.

"M-Mars!?" Keima exclaimed, as the white figure climbed out of Yui, "what is going o-"

"So it happened to me too," Mars glanced down at her hands, which were barely resembling human appendages, "I've gained enough power to return home."

"W-w-wait, were you expecting some-" Mars turned to look at him, and Keima blushed, covering himself with his hands.

"You're not supposed to come out now," Yui groaned, "just come back, and we'll talk to Ayukawa after I'm done."

"Are you going to continue to ignore me?" Mars asked, and Yui hesitated.

"I won't say it," Yui made her choice and the goddess sighed before her fingers twiddled against each other. Keima felt his stomach sink as her fingers began to move too rapidly for his eyes, like she was casting a spell.

Her fingers crossed, and he felt his head pulse. He tightened his hand on the blanket as his vision pulsed to the point of blindness.

He could still feel the blanket under his fingers, but as soon as his vision came into focus, he could tell something was wrong.

His angle… his view… he hadn't been sitting like this. Then he spotted his arms, covered in goosebumps… a pair of boobs, then his legs… his pelvis, then his chest… his face…

He suddenly pulled his hands into view, but his fingers looked nothing like his… nails filed into neat tips, and fingers long and tapered. A girl's hand.

He was a girl.

"K-Keima-kun?" he heard his voice ask, even though he had not spoken.

"Y-yes…" he responded, his voice a bit low, but undeniably female.

"You know what you have to say, Yui," Mars turned to Keima's body, clearly unsurprised by what had just happened, "after you do, you'll get your body back."

Mars drifted out of the curtain, with Keima and Yui watching her in each other's body.

"Motherfucker," Yui swore under her breath, her – or rather, Keima's – head falling in defeat. Keima had his eyes closed already as the gravity of the situation settled in his brain.

Motherfucker… that sounds about right.


So... that happened... Keima and Yui have swapped bodies again. I really hope no one expected that :P

But here you have it - an almost normal individual tutoring session until Mars dun fucked it up and caused another body swap for those two. How will that turn out? Unfortunately that will need to wait for the next chapter, which I will post next weekend. Don't want to keep ya'll waiting too long after a cliffhanger like this.

So review time :)

MintCar-92: Lol, the scene where Dokurou talks to Chihiro about Tenri was in chapter 14... lol, that was a while ago, huh.

But yeah, Tenri has all the reason to be bitter about Keima, and I want to sort out any of those unfortunate feelings by the end of it all... so I guess I'm setting up some plot further in the story :P

Lol, there are flavoured lubes, so I couldn't resist... but for real, strawberry lube smells more like candy. The taste is... palatable, but not anything you'd want to actually eat :P

Though that's really cool that you called that with Yui. I think from the start, I wanted her to be kinda kinky, though it did tone down in my head over time. Ah well, I guess no BDSM in this story - we stan wholesome smut :D

Lol, unfortunately you may need to wait one more chapter for that warrior answer. I think Keima is winning so far, but I did kinda flip the board in the end.

As always, thank you for your review. It really brightens my day when I see them :)

xellos540: We go through this same song and dance each time, but please take however long you need to review. You write your own world-class essay each time, so of course that takes time. Also, if you want to leave shorter ones, those are good too :P

But with the topic on hand, Tenri is in for a hard time. She definitely has the strongest bond with her goddess compared to the other hosts, and she will lose the most once everything is over. She's endured a lot within the story, and I hope that she'll make some new friends at the end of this.

I laughed out loud at the "Sorry Tenri, but "don't come here" is in direct violation of this fic purpose" line. Everyone has to come... everyone has to come multiple times... **stares at Tenri intensely**

The daydream part... is actually a callback to a really old fic I wrote, TMBD. There isn't much canon content about when Chihiro did realise that she liked him, but there was a kind of allusion in her song Special Memory, where she remarks that she fell in love at first sight, during class and cleaning duties - whether this is about Keima is anyone's guess though.

Hmm, that's an interesting thought, actually. I think both Chihiro and Tenri understand how Keima works, and now they are also more familiar about the other person too... I'm not sure about a Tenri and Chihiro twist, but there's definitely more room for them to talk for the rest of the lesson... especially with Chihiro and Tenri disagreeing on how to continue.

Lol, now you know what has happened with Yui and Keima, and I think he was kinda on top, as Yui does seem to want to hold back. I guess we'll see more of that later on.

Also, yes, I'm a sneaky author... heck, I literally was sneaky responding in this message, but you probably won't know what I'm hinting at here.

As always, thank you for your reviews. I love them.

And to the rest of the lurkers out there, while I would like to hear your thoughts something, I'm grateful that you're reading this story, and hopefully got as far as this.

Stay well and I'll see you next time.