Nagisa's breaths come out hard and heavy as he attempts to focus on what Karma's doing. Specifically, Karma had told him earlier, that the goal was to watch him carefully. That's why he's sitting like this, between Karma's legs, his back pressed against his chest. Karma's head is resting on his shoulder, as his hands snake around his waist, slowly working his erection.

It's too hard to concentrate properly, but Nagisa makes an effort. Their lessons have been going on for a little while now, and mostly it's just been practise. Nagisa's even confident that he's pretty good at handjobs, at this point. This is the most intimate it's felt, how close they currently are, which is odd considering they've taken each other into their mouths. But somehow it feels different, all of Karma's body pressed up against his.

"Ah," Nagisa moans, leaning his own head back when Karma runs a thumb across the head of his erection.

"You're sensitive there," Karma states.

Everything feels heightened in this position. Instinctually, he wants to grab onto Karma in any way he can, to pull him closer. Instead, though, he just presses back into him, almost grinding his hips up into his hand. As he does so, though, Nagisa can feel something kind of suspect against his back. He grinds once more, as if to check, and he's certain then that Karma's also hard.

Everything makes a little more sense. Somehow, he still has the capacity for nerves to creep up though. Karma seems to have that effect on him. The truth is, they'd never done anything at the same time. They… took it in turns, and that worked well. Is working well. Somehow, the idea of one of them not being completely out of their mind is a little more comforting. But, strangely, Nagisa feels like this is kind of nice too.

He tilts his neck, leaning into Karma's touch as though he's desperate for it. Perhaps he even is. Karma seems to get the idea, fixing his lips around a small area of his throat, and Nagisa keens. He didn't realise he could be so sensitive right there, but Karma's lips feel like molten. It's certainly different to when he goes down on him, where all of the pleasure is fixated around his crotch, rather than this, far more akin to a whole body hum.

It's not hard to admit to himself that he likes this more.

Karma's sucking against his skin, for a moment, before he pulls his lips off. "Sorry."

"H-huh?"

"Might accidentally give you a mark or two," he breathes against his ear. "You can't show up to work like that. What would your students think?"

The embarrassment that washes over him is strange and unfamiliar. Nagisa can't concentrate on it, though, because Karma takes him into his hand with even more vigour, and Nagisa rewards him with a moan that feels heavy. His other hand moves up under his shirt, towards his chest. Nagisa's not really looking at that, so he's taken by surprise when his thumb knocks against his nipple. He jolts, actually, because it's more sensitive than he thought it could be.

"Stop moving," he can practically feel Karma's smirk against him.

Nagisa feels even more strange, though. He wants his lips on his neck again, mark or not. He wants more. He wants to grind against where Karma's clearly hard. He wants him to squeeze his nipple more. He wants… he wants… he wants to turn his head and kiss him. He wants Karma's lips to move firm against his.

"Karma-" he gets out, before shooting all over his hand.

Like always, he works him through it, jerking him firmly until the moment where he gets just a little bit too sensitive, and bats his hand away. His breaths start to come heavy, though, and he slumps, head lolling against Karma's shoulder. Mercifully, he doesn't try to move him off straight away, instead letting him come down for a moment.

Eventually Nagisa's brain catches up, and he shifts away from Karma, cringing at the sensation of his now sweat soaked shirt coming apart from him. Nagisa's not entirely sure what to even say, for a moment. Usually that's Karma's job, separating their sex relationship from their normal friend one. It's what they'd taken to. Everything was fine with this, so long as they could still hang out like normal.

Nagisa gets the courage, addressing the elephant in the room. Or, well, it was more like a trunk really. "You're still…"

He looks down at his own trousers, as though he hadn't realised. "Oh, yeah."

He ends up getting him off with his mouth, which doesn't take as long as usual. Maybe Nagisa's just getting better at it, or maybe it was the stimulation from earlier, though Nagisa's not sure how intense just shifting against him should feel. He thinks about suggesting it, but quickly gets distracted with the blowjob. There is a lot to take into account, after all.

"Do you want to play a couple rounds of Nihon No Kenka Geemu?" Karma asks, as Nagisa wipes his spunk from his hand.

Whilst he pulls his discarded underwear up, he does consider it. Video games are good, natural territory for them. Usually Karma ends up winning, especially fighting games, but that's mostly due to how well he remembers combo moves. Nagisa's a little hopeless with that, even if his quick reflexes save him from time to time. Besides, spending time with Karma in their regular capacity makes him far more okay with their more recent developments.

Nagisa feels kind of gross, though.

"My back's all sweaty," he says, "after that. I should probably just go home and shower."

"You can use mine if you want."

Alarm bells start to ring. Shower? In Karma's house?! Perhaps it's a little ridiculous, considering he had him in his mouth just a minute ago, but somehow that feels like crossing a line. Showering feels kind of intimate. That would mean cleaning himself where Karma cleans himself every day, using his soap?! Would he end up smelling like him too?! Nagisa doesn't even like using the toilet in other people's homes if he can avoid it.

"No!" He panics, and then takes a deep breath, reminding himself that Karma probably isn't following his train of thought. "Actually, I set my students quite a large assignment last week, and it's probably going to take all weekend to grade it. M-maybe next week, though?"

"Sure," Karma looks unbothered. "Next week."

Nagisa smiles to the best of his ability, and gets off Karma's bed entirely. He's fine, with this. He doesn't need Karma to walk him out. In fact, he almost feels a little better when he doesn't, when there's no lingering. It's easier for the both of them this way. Nagisa feels like he needs some fresh air, anyway, to clear his head.

Karma joins him out in the hallway, though, and clears his throat, an amused look upon his face. "You don't want to leave without these."

Horrifyingly, the balled up item Karma throws in his direction is his jeans. Meaning Nagisa was happily about to leave in nothing but his boxers. "Right! Thanks!"

At least Karma doesn't say anything else, though he does watch him as he tries to get them on and pull them up, shuffling awkwardly to get them over his ass. There's a reason he usually wears cargo trousers. Karma doesn't actually laugh at him, at least, during the process. He just lets him go, when he has them on, and Nagisa doesn't look back to check if he's still looking at him.

Yes, sitting on the train in this state makes him feel kind of disgusting, and yes, he collapses straight into bed after finally showering. It's not unusual, he's found, to be kind of exhausted after his sessions with Karma. But Nagisa's not that fond of late nights, anyway. He's always been more productive in the morning hours.

He wasn't actually lying when it came to grading his students' projects, even if he didn't work on it directly after visiting Karma. He does spend the rest of his weekend on it, though, almost with a permanent frown on his face. Most of the work is pretty good, but he knows a few of his students are capable of more. Nothing horrendously bad, but he makes a note to talk to them about it during school hours. He knows everyone learns and improves at their own pace, but some seem to be lagging behind a little and it's cause enough for concern.

He holds out until Thursday.

It's just how things seem to go, now 'sex class' with Karma is a regular fixture in his life. He expects it, so he doesn't spend the whole week bundled up with nerves over it. Not that he avoids them entirely, though. But two days out of his week isn't so bad. And, it's getting better! Most of the time it's more of an anticipation, than actual nerves.

This time, though, feels different. This time Nagisa has one thing on his mind and it's Karma's lips. Considering everything else they've done, it really feels kind of stupid. But the thought was planted in Nagisa's mind and now he can't stop. Nagisa at least isn't innocent to kissing, but he hasn't kissed Karma before. He doesn't know what that's like, but he most certainly wants to. If his lips would feel as soft against his as they do around his erection-

Something strikes him right then, though. Being taught about sex… that could technically be anyone. But right now… he's thinking about Karma specifically. Nagisa already knows kissing. He doesn't need to be shown how to do it. In fact, he even got a higher grade than Karma, back in 3E! It's a little unnerving, actually, like suddenly his acceptance of their situation is being shifted out of alignment.

"Okay," Nagisa addresses his class, trying anything to get it out of his head. "So today will be the final lesson on personal health. I asked you all to write down some anonymous questions, so we'll just spend this period going through them."

Nobody makes any gestures, so Nagisa just takes a deep breath and reaches for the first one.

"'Will my," he chooses to omit the explicit word there, "penis fall off if I do it too much?'"

This is going to be a long hour.

Admittedly, some of the questions are fair concerns. Once he gets into the swing of things, he doesn't feel shy discussing them. If his arrangement with Karma has helped one thing, he's definitely more comfortable with sex as a subject. Even if most of these questions are technical things he didn't exactly need practical knowledge for.

"Is it really better to wait until marriage?" Nagisa reads his last question aloud. "Well, that's a difficult one, and I think the answer changes depending on the person. Of course, pregnancy will always be a slight risk, so putting yourself in the most stable position is always a good idea. The most vital part of sex is trust," he thinks through, "and trust comes in different stages. If you feel like you need to be married to trust someone enough with that part of yourself, then waiting might be best for you. If you feel that you trust someone after just weeks, as long as you're sure and happy, then that's okay too."

Kawaguchi raises her hand. "What about love?"

"Love?"

She blinks. "Isn't love the most important part of sex?"

Something goes over Nagisa, then, as though that's some kind of revelation. Of course he knows just how many people have casual sex, and just how much love has nothing to do with it for them. If he said something like that to, say, Maehara, he'd probably just laugh in his face. Nagisa supposes love might have been part of the reason he's waited so long. But he doesn't love Karma. Maybe he lusts for him, at least a little. Maybe his perspective just… changed.

"Maybe for some people. You're right," he corrects, "The most important thing might change, depending on the person. But no matter what, trust is very important."

And he does trust Karma, he thinks for a moment, when the bell mercifully rings and he can focus his attention to Maths. Although Nagisa's totally capable of teaching it, maths was never his best subject, so he can't exactly let his thoughts wonder, even if his class aren't studying anything particularly complicated. Sometimes, their questions can lead places, strange tangents he struggles to explain properly. He knows someone who would have an easier time with that. But he can't think about it, because one of the students who sits on the front row has his hand up, ready.

"Yes, Akaba-Akazawa kun?"

So maybe Karma's more twisted up in his thoughts than he realised.

Akazawa doesn't seem to notice, at least. "Sensei, I have a question about the last problem."

He goes over to help him, explaining it again in a slightly different way. Akazawa's math grades are actually pretty high, but he always seems to doubt and second guess himself. By instinct alone, he's usually right the first time. Nagisa's no person to criticise overthinking, though. At least Akazawa seems to get it.

Nagisa tries his very best to not think about it for the rest of his workday, or on the way home. That would be easier, if everything didn't seem to remind him of lips. On the train, he can't stop staring, as even the weirdest connects seem to strike him. The more he tries not to think about it, the stronger the image becomes.

Nagisa knows that kissing is a part of sex. And sex is where this thing with Karma is leading, even if neither of them have officially said it. Karma hasn't pushed for it yet, and Nagisa's simply following him. Which means, inevitably, he's going to have to kiss Karma at some point. Even the thought of it makes his stomach twist in ways that have become too familiar to him.

A part of Nagisa wonders if Karma's broken his sex drive entirely. For him, it's always gone between low to non existent. Usually, there were far more important things to think about than gratification. But Nagisa has a decent life now. Sure, he hopes he'll get a more spacious apartment someday, and there's a few habits here and there he could improve on. But everything else in his life is fine. He's settled, and now he has time to slow down and want things.

And he wants to kiss Karma.

The realisation feels strange, as it washes over him during the short walk from the station to his building. He supposes, though, if kissing is a part of sex then it doesn't have to be romantic. So long as it happens during sex. Would it be so bad, if he kissed Karma before going down on him? Would Karma mind? Would he lean in or push him away?

He's not hungry, when he gets into his apartment and closes the door behind him. Usually at this time, his stomach is a little ravenous, but instead there's a strange mellow feeling that threatens to swallow him whole. So, instead of pulling a sad packet of instant ramen from his cupboard, he instead steps lightly across the room and collapses onto his bed.

All Nagisa knows right then, for better or worse, is that he wants it to be the weekend already. Somehow, that's the solution to the way he feels. A part of him challenges that he can't exactly live like this forever, defining himself by their one weekly arrangement. Nagisa may not always be the best at understanding his own feelings, but he does know that.

It's like Karma's some kind of fix.

-Not that Nagisa knows what a 'fix' is like, of course. Or an addiction. Nagisa has never done drugs in his life, and he never intends to. For the record. He was taught better than that.

But this is what he imagines drugs might feel like. A part of him even likes it, the nervous flutters he's feeling. What's the matter with him? Nagisa blinks slowly, staring aimlessly up at the white ceiling. It would be easy enough, he thinks, to get lost here. He starts to wonder if he should put a poster up there or something just to take up the blank space. It almost feels like it's moving.

But then Nagisa realises that no, it actually is moving. His bed starts shaking pretty violently, and his phone starts to join in on the action, blaring an ugly high pitched alarm. Nagisa judges it for a few seconds, before deciding the earthquake isn't strong enough to warrant jumping underneath his bed. He sits up, at the very least, as his bed slightly inches across the room.

He collects his thoughts, once the tremors come to an end. The quake wasn't strong enough to break anything, at least. Looking over at his phone, the alert text simply informs him that there would indeed be an earthquake. Well, that had been obvious enough without the warning. It's no big deal, though, and he pulls himself together enough to get up and right his bed, before actually starting to think about dinner. Perhaps the universe was sending him a sign.

When the weekend actually does come, however, Nagisa feels slightly nervous again. It's like he doesn't know what he's doing again, and these thoughts… they might slip out if he's not careful. Karma has a way of getting stuff out of him, of making him not think right. Perhaps there's something the matter with him.

He forgets it all, though, when Karma opens his door. "Come in."

"Thanks for having me," he says politely, taking off his shoes.

Nagisa's not sure why they always start out so formal. Really, it just feels like something they both do to feel safe, like a handshake before the veil drops. It's without question, now, that Nagisa should simply walk to Karma's bedroom and wait for instruction. Maybe that's a little weird, but somehow that makes the flow of things better for him.

Or maybe this arrangement really is messing up their relationship after all.

"Karma," he says instead, "I-"

"What?"

Karma's not being short with him, though. If anything he just looks mildly confused. Nagisa stares up at him, searching his expression for some kind of tell. Even to this day, Karma's always been one of the hardest people to read, since he keeps his emotions under such strict guard. Hard, but not impossible at the very least. His lips are parted, and Nagisa wonders if it would be difficult to reach them given the difference in their heights.

"I want to try something new," Nagisa says. "U-unless there's something you were planning today."

Karma looks a little taken aback for a moment, but he soon recovers. "Sure. It's up to you, anyway."

Nagisa doesn't really like that kind of power. He looks down, heat rising to his cheeks. This is the way they used to be, so many years ago, right at the start. Karma would take a step forwards, and Nagisa would follow right behind without question. Why would he question it, when he was lucky that Karma let him hang out with him in the first place? Nagisa knows he's over that now, he doesn't see Karma as a level above him in life. But when it comes to this kind of thing… Karma's so far ahead.

"L-like last time," Nagisa gets out, still blushing. A part of him rationalises that actually doing it might be a problem, if he can barely even speak about it. "Pressing our bodies together, I mean-"

"You mean grinding?" Karma has the nerve to laugh. "That's so high school."

Because Karma probably had those experiences in high school. Nagisa doesn't resent him for it, otherwise they wouldn't be here. They wouldn't be doing this. Even though it's clear Karma has plenty of experience, Nagisa doesn't actually know how many. They've hung out at least once nearly every week since 3E, but somehow love lives never really got brought up, only mild jokes from Karma here and there. Something uncomfortable twists him at the image of Karma with someone else, though.

"I didn't know," Nagisa explains a little sheepishly.

Karma casually waves him off, though. "I mean, if you've never done it… It's not like it never happens in foreplay."

Foreplay. It's in the word. Foreplay means that you intend to lead up to something more. Whilst Nagisa is pretty certain they'd talk more about it if he meant doing that, mostly it's just a reminder. Nagisa's still very much a virgin, they've established that. At the very least, he still feels like one, despite everything they've done.

He follows Karma into the bedroom, sitting down somewhat coyly on the edge of his bed. Previous times, this was when Karma would drop down to his knees, swiftly prying his legs apart with his strong grip. At least unless Karma had something specific he wanted to say. Right now, he just stands there, like he's making some kind of evaluation.

"Can you scoot back a little?"

He obeys, shifting so he's more fully on the bed. Nagisa at the very least knows the theory of grinding, and somehow it doesn't feel like that's about to happen. There's something cold and measured about this, rather than the energy of fluid fumbling. Karma follows him, though, practically climbing on top of him and pushing him down by the shoulders, so that he's lying flat.

"What are you doing?" Nagisa stupidly asks, before he can stop himself.

Karma blinks. "You kind of need to be lined up."

This feels awkward. At least when it comes to the blowjobs and handjobs, there's enough pleasure to distract him from the situation. Karma leaning over him feels strange. This would be easier if they were kissing, he thinks. Unfortunately, due to their difference in height, Karma trying to line up their crotches means there's no chance that could happen, even accidentally.

Karma's looking down at him, though, before instead rolling off. "You didn't really want to do that. There's something else."

"Huh?" Nagisa sits up too, somehow feeling a little defensive. "But we didn't do anything yet."

"I'm not going to," he replies casually, looking at the wall instead of him. "You looked uncomfortable. Shaking isn't much of a turn on."

Sure, maybe has a lot on his mind. Or maybe Karma's right. Something makes him feel good, in the tone of Karma's voice. He won't push him, if he doubts that Nagisa actually wants it. But maybe Nagisa does need to be pushed. At least just a little bit. He knows this shouldn't be complicated at all.

Nagisa finds himself reaching out, his hand meeting his arm. "Karma," he says, "I trust you with my body."

"I know," Karma muses. He's practically leaning back against the headboard.

"But I still don't know what I'm doing, with this kind of stuff," he admits. "I… want you to tell me what to do."

Weird. Nagisa hadn't even internally thought that through, before blurting it out. Maybe that's the solution here. He needs to just stop thinking at all. Maybe having Karma lead the way through it isn't a bad thing at all. If Nagisa really means that he trusts him, then that makes sense in some kind of way.

Karma looks him over. "Come over here then."

He's still not telling him exactly what he wants, but Nagisa decides to take at least a bit of initiative. He rolls forwards onto his knees, the mattress shifting under him. He continues, though, too late to back out now as he swings one leg over Karma's, so that he's basically sitting in his lap. Karma doesn't stop him, only moves his arm to accommodate him better. At least here, their faces are more equally matched.

"I can't tell you what to do without knowing what you want," Karma says. "So just do it."

Like his words are some kind of spell, Nagisa darts closer before he can stop himself, and plants one on Karma's lips. Nagisa should rightfully feel experienced in this surprise kiss thing, but if anything he's at a loss. It feels like a static shock, when they actually connect. Nagisa finds himself pulling away immediately, as though that was some kind of punishment for entering a territory he shouldn't have.

"That's all you wanted?" Karma tilts his head.

Though Nagisa can at least tell he's not teasing him, he still starts to feel embarrassed over it again. Logically, he understands it shouldn't be much of a big deal, all they're doing is touching one body part together. It shouldn't feel like more than just that, more intense than sucking him off, really. The only argument Nagisa can come up with is when it comes to that at least, he actually has experience, it's not completely new to him. Therefore he understands it better.

"I wanted to try it," he finally says. "I thought kissing was a part of sex, after all."

Karma half chuckles. "You had higher grades than me, back in class."

"Don't remind me!" Fresh heat rushes to his face. "The one time I get top grades…"

His hand slides up, then, sweeping across Nagisa's cheek and through his hair, before eventually landing at the back of his head. Nagisa can't resist him, as Karma pulls him in close, back in to kiss him again. Since he doesn't immediately pull back this time, Nagisa actually gets to experience it. Not that this is a heart racing passionate kiss or anything.

It feels different to when he kissed Bitch Sensei. That had been so intense it was uncomfortable. And with Kayano, he hadn't really been thinking about the kissing part, just the quickest technique to knock her out so that Korosensei could remove her tentacles. There was no really thinking about what the kiss meant.

Karma's leading him, but not aggressively. And he's right, Nagisa at least does know how to do this. He knows the right way to follow, to tilt his head, to move his lips. Soon enough, though, he stops thinking about what he's doing. Technique, the perfect responses, they all seem to fade away from him. He presses closer into Karma, growing bolder as he just does what he wants.

Karma's other hand slides against his waist, which is as good a reminder as any about what they're actually doing. The growing buzz within him is different to that of the plain pleasure he's become used to experiencing. Something about this is more like… anticipation. Kissing Karma is definitely a nice feeling, he concludes, and he wasn't wrong for spending so much time wanting it.

He gasps into the kiss, when Karma's hand actually works its way under his shirt. It's a reminder that they're not supposed to just be making out here. Karma seems to remember that right then too, because that's when he decides to deepen the kiss and add tongue. Nagisa technically knows how to respond to that, but it takes him by surprise and he feels like he's melting.

There's a certain kind of energy building between the two of them and Nagisa doesn't know what to do with it. He keens forward, though, so that his chest is pressing right up against Karma's. Apparently that was the signal to take a small break, because Karma shifts his head back, taking a deep breath. Before Nagisa's mind even has a chance to wander, however, his other hand moves down too, and before Nagisa really knows what's happening, Karma's tugging his shirt off.

He doesn't feel cold in the slightest, even with that extra layer gone. He does find himself leaning forward, though, and capturing Karma's lips again. He complies, and Nagisa figures out on his own that maybe he should repeat the action. Boldly, he digs his own hands under Karma's shirt, and starts to pull it off. It's actually a little harder than it looks, but Karma assists him, raising his own arms. Somehow Nagisa doesn't think twice about leaning in to kiss him again, rather than pausing to admire his bare chest.

"Good?" Karma breaks to ask.

"Mm," he gets out. "Is this-"

Karma sighs a little dramatically. "Relax on your knees a little. Here-"

It feels odd, being manoeuvred like this, but Nagisa lets him do it. Karma's hands actually focus on his ass, squeezing his flesh through his trousers so that he lowers down, actually on Karma's lap this time. It doesn't feel like some kind of life altering incredible pleasure, but Nagisa doesn't dislike the position. If anything, it's more the context of it, what it could lead to.

"Is that what you wanted?" Karma says, though not aimed anywhere.

"It just feels uncomfortable," Nagisa admits, his erection, which had slowly come to life, straining as it's trapped inside his trousers. "Should we take them off?"

Karma shrugs. "You're the boss."

Nagisa actually has to raise himself up again for that. Actually, trying to maintain their position turns out to be impossible, so he awkwardly climbs off as they mutually attempted to discard their trousers and underwear. It's just a tiny bit of a mood killer, in all honesty, but Nagisa feels an extra buzz of excitement at the fact that they're both mutually completely naked.

His body feels hot, when he climbs back on top of him again. Almost like a fever, and Nagisa's out of it. Kissing Karma feels good, but with the absence of clothes and any other barriers, he's pressed right up against him. Nagisa's own erection presses up against Karma's stomach, and he finds his breaths growing heavy with the sensation.

Now that kissing is introduced, Nagisa can't think everything through at all. If he chooses to concentrate on their kiss, then he can hardly control the rest of his body. That's a lost cause as it is, it turns out, because the friction makes his hips jump. Karma's hands go back to his ass, and Nagisa even groans into the kiss when he squeezes.

It doesn't take long for Nagisa to experiment with movements. It doesn't directly feel as good as a hand or mouth, but just like before it's elevated with the excitement their position brings, the closeness. Thinking about it, Nagisa might even say he prefers this to the other stuff. His mind can't go anywhere but in this moment.

"Use your hips more," Karma instructs.

He does. And Karma's right, as to be expected. When Nagisa experiments with twisting and grinding his hips, it does start to feel really good. Karma's own erection brushes up against his, and Nagisa wonders if it feels the same to him. They can't really kiss properly anymore like this, but somehow he's okay with that, the two of them breathing together as small noises escape from their throats.

As Nagisa shifts himself on top of Karma, he starts to wonder if this is what sex is really like. Nagisa at the very least is aware of the more popular sex positions, even if he'd have no idea about them practically, so he knows that this is one. Though neither of them… has anything inside them. That thought weirdly heats him up more, but he swiftly tucks it away. It's certainly different, getting off together at the same time.

Every caresses of Karma's hands threatens to make him squirm and shatter. He seems casual about it, though, moving his own hips at Nagisa's face, brushing his hands up his arms, and down the length of his back, before finally stopping at Nagisa's waist. For a moment, the clench of his fingers feels good, but Nagisa swiftly realises that he's actually trying to still him.

"Is it wrong?" Nagisa knows his voice is strained, and he can't focus well enough to figure out if there's something off in his expression.

"No," Karma says a little carefully. "Just, do you want to try it another way?"

Nagisa blinks. "Sure. Show me."

Karma grips him firmly, before rolling them, tipping him onto his back like he'd tried to earlier. Even if they can't kiss like this, the atmosphere is completely different now. Karma braces himself on his forearms, before leaning down and grinding their crotches together. This position allows him to do it harder, Nagisa gets that now, and he can't say he wants to complain.

In fact, Nagisa tosses his head back, embarrassingly spreading his legs so Karma has an easier time slotting himself between them. Everything's steaming up now, and wow. With the way Karma's moving against him, it's pretty much like thrusting, and Nagisa surprisingly doesn't hate it. No, he just lets his toes curl up and goes along for the ride.

"Feel up to trying something?" Karma's voice is more strained this time.

Nagisa attempts to look at him. "S-sure."

He pauses his momentum. "Wrap your hand around us."

The width of both their lengths is more than Nagisa's used to holding, but he makes his best attempt at it, hissing at the extra heat. Karma nods, seemingly satisfied, and Nagisa starts to get it. Actually, it takes a surprising amount of coordination, to attempt to jerk them off at the same pace as Karma's movements. It feels good, though, better than what they were doing before.

Karma's erection sliding directly up against his, encased in just his hand… Nagisa can feel everything like this. They're both leaking precum at this point, so it's definitely slick enough. It does feel a little strange, good strange, being pressed together. Nagisa's hips start grinding back into it, and though he can't feel every single detail, Karma's twitches and pants of exertion begin to satisfy him.

"C-close," Nagisa warns, something he's been taught to do by now.

Since he actually has most of the control over the situation, he can't really prevent his own hand from speeding up. Of course, it's much easier to thoughtlessly obey the whims of his own body. But he's doing those things to Karma too, by default. Karma doesn't seem to mind at all, supplying him a few groans here and there, to remind him he's at least enjoying this.

Nagisa can't help it when that band finally snaps and comes loose. He tosses his head back with a throaty moan, his hand speeding up to work him through it. Only when it gets too much, and his hand comes to a pause, does he realise that Karma stopped moving entirely. He's still braced over him, though, looking down at him in a way that Nagisa might have to unpack later.

A spark of determination goes through him. Though he lets go of his now quickly softening length, Karma's still most certainly hard. So hard it almost looks a little painful. Not stopping to think about the fact that his hand is covered in his own release for more than a half a second, Nagisa pushes through his own sudden exhaustion to grip him.

Karma actually whines, when Nagisa gets to work on jerking him the way he at least understands by now that Karma likes. He's had plenty of practise and feedback on it already. It seems Karma was already pretty close himself, at least, because Nagisa's arm is only slightly aching by the time he actually comes himself, collapsing on top him once he's done.

At least Karma gains the courtesy, after catching his own breath, to roll off him so that he's again at his side. Nagisa's thankful for that, since Karma is a lot bigger and he would be a bit concerned about his lungs getting crushed. The static energy from earlier returns, then, buzzing all the way through his legs and down to his toes. He decides it's pleasant.

Nagisa knows right then that he's kind of disgusting. His hair is all messed up from Karma's hands, his lips must be kind of swollen, and he's definitely covered in sweat. Not to mention the evidence of their activities, starting to dry across his torso. He'd be really grossed out by that, but at least in that moment he couldn't bring himself to care. No, instead, he's weirdly at peace, which is a far cry from how they'd started this session.

If this is what sex feels like, then Nagisa decides he might be ready. If it means he can be close to Karma again like that, then he wants it.

"Pass," Karma says.

Nagisa twists his head to look at him. "Huh?"

Karma just hums. "No further feedback needed. You did fine."

Well of course. These are only lessons, after all.