Nagisa's eyes focus on the ceiling.

Karma's apartment is pretty standard, so it's really nothing special. He kind of wishes that there was texture there, or something to keep his mind distracted. Instead, it's just solid white, but it'll do for now. The thing is, Nagisa's worried that if he actually concentrates, everything will start to feel too good. It's already started to be an issue for him.

Currently, Karma's lips trace his stomach, and his hand runs along his right shin. He tries not to squirm, but it tickles a little. He just keeps going lower and lower, and a part of Nagisa wonders if he intends to eat him whole. Karma's face is obscured by his hair, but every now and then, as he twists his neck, Nagisa catches a self satisfied smirk on his face.

This lesson had seemed simple enough, when Karma suggested it. It's his belief that you should make an effort to learn where your partner's the most sensitive, if you intend on being with them more than just once. He and Karma have long since passed that threshold. Nagisa supposes he's been doing that anyway, paying attention to the things Karma likes, but never specifically.

"Hah," he lets out, when Karma's teeth scrape against his hip bones.

Nagisa's learning a lot about his own body too. The first is that he likes teeth all over, apparently. He's embarrassed by that, the idea of having a 'fetish' or something, but if anything it just seems to spur Karma on. His teeth remain in location, but he closes his lips around the area and sucks. Nagisa doesn't mind the sensation, though it's not the most sensitive for him.

He hadn't realised just how complicated bodies could be. He'd freaked out a little earlier, when Karma started to play with his chest. Nagisa had wrinkled his nose at it, because he's not a girl, even though Karma insisted it could feel good regardless. It had just felt a little uncomfortable, really, and Nagisa's still not sure about it. Maybe he's being too in his head. But everything else feels a combination of good and great.

Though he doesn't consciously mean to, he ends up spreading his legs a little as Karma shuffles lower, giving him more room. Predictably, Karma decides to ignore his now straining erection all together, paying far more attention to his thighs. Nagisa didn't realise, before this, that his legs of all things would be a sensitive place for him. But Karma's lips suck against his inner thigh, and he can practically feel warm blood rushing southwards.

Karma has to pin him down somewhat, because the squirming is getting worse. Embarrassingly, Nagisa doesn't actually mind the feeling of his strong hands holding him down on the mattress. The pressure is kind of nice, and though he knows he doesn't exactly want to be bossed around, there's a part of him that likes being told what to do.

"Do you want to turn over?" It's a gentle question, at least.

Nagisa hesitates though. He really does trust Karma with his body, he knows that, but he still feels shy. At least facing each other, Nagisa can keep an eye on what Karma's doing. Behind him, though, Nagisa really is handing himself over. A thrill does go through him, though. He shakes as he does it, but he turns over onto his hands and knees.

Immediately it feels weird, certainly exposed. Karma doesn't hesitate though, and leans over him, lips on the back of his neck. As it turns out, his back actually is pretty sensitive. Nagisa arches into it, as his hands rake down his spine, but it still feels a little weird. Although he's definitely a little uncomfortable, it's not so bad that he needs to stop, so he tries to stick with it.

Karma's hands run from down his spine, and then unashamedly squeeze his ass. Nagisa tenses a little, unsure of what he's going to do, though he trusts that Karma wouldn't just spring something on him. He's cautious, at least, as his hands move around the area. Nagisa relaxes after a little while, and whilst it doesn't feel amazing, he can't say it's bad either.

It's the closest Karma goes, before nudging him back over again, and finally wrapping his hand around his erection. In a way, it feels kind, since he's essentially been teasing him for the longest time. Nagisa supposes none of that was really about getting him off, though. As Karma had explained, it was far more exploration than anything else.

Fortunately, Karma's already explored him there many times already, and so draws an orgasm out of him within minutes.

Afterwards, Nagisa just catches his breath. His body feels a little weird after so much attention, aching slightly in places, but mostly buzzing a little in others. At least usually, Karma says something to him, or he's doing something that leaves Nagisa too distracted to care. This time, though, feels significantly silent.

Nagisa had understood, from the very start of their 'arrangement', that they'd have sex eventually. Considering they've done everything except that, practically, it feels like they're stalling somewhat. Nagisa wonders if Karma's waiting for him to say something… though Nagisa's made it pretty clear that in this, he just wants to take his lead.

"Is it my turn?" He asks instead.

Karma looks at him for a moment, before lying flat on his back, gesturing his welcome.

Despite himself, a flush creeps onto Nagisa's face. It's hard to do this, with Karma watching him so intently. He climbs on top of him, bearing it for just a moment or two before he can't anymore. Instead, he leans down and captures Karma's lips, which at the very least helps to calm his nerves. Thankfully, Karma obliges.

All in all, maybe Nagisa's a little embarrassed about how much he enjoys the kissing. It's a world that, plainly, he just understands better. And he really likes kissing Karma. He's good at it in a slightly different way, Nagisa thinks. Actually, for the most part he's leading it, and Karma is following him blow for blow. He can't help but moan at the thought, and ends up pressing down on Karma's chest, pushing him flat.

He pants for a moment, breaking away as he has to evaluate what to do. He collects himself, and remembers that after all this is only an experiment. And really, Nagisa really does like investigating. He starts with Karma's jawline, leaning down to kiss it, before moving on to his neck. Karma hisses when his lips attach to a certain spot, and Nagisa can't help himself from pressing into it further, adding pressure as his teeth naturally find their place against his flesh.

"How come you get to leave marks, huh?" Karma half pants out.

It was one of the few caveats Nagisa had introduced. He loves the feeling of Karma's teeth all over his body, clearly, but he knows that's precisely the way you get hickeys. A part of the process appeals to him in a way, but Nagisa has a career after all and that kind of thing would be highly inappropriate. He's sure Karma's in the same boat, though, and pulls away with a flush.

He examines him again, unsure of where to go next. He feels like he should copy what Karma did, leaving no area untested, but he wants to do something else first. He retraces Karma's steps, trying to think. One of the first areas Karma had gone for was his nipples, despite his embarrassment over it, since supposedly they were 'very sensitive'. Actually, Nagisa hadn't really liked that touch, but it makes him think there might be a reason Karma brought it up.

His finger traces down from his throat and collarbones, before finding its place at his chest. Nagisa still feels embarrassed to just grab at them, though, so he makes it seem like it's more of an accident, as his hand slips against the right one. Karma tenses up immediately with a sharp intake of breath, though Nagisa doesn't know how to interpret it.

His hunch is that it feels good, which gives him just enough encouragement to do it again with more purpose. He would have expected Karma to actually say something to that, but he's entirely silent, though when Nagisa sneaks a glance he's watching him. It certainly strikes a curiosity in him, but he decides to return to the kissing.

Although Karma did the very same thing to him, it feels more intimate than anything else to be kissing against his chest. His heart is down there, he thinks for a moment, before moving away. Nagisa can't explain why he does it, not even to himself, but his tongue darts out against the nipple he brushed earlier.

Karma makes some kind of noise at that, but it doesn't discourage him. In fact, it just encourages him to explore on instinct, and he sucks at it in a way that's not too dissimilar to the blowjobs he's practised. Karma seems to flinch, before his back arches up towards him. When Nagisa next sneaks a glance, his eyes are creased shut.

In that moment, he decides he's too satisfied with that to care about the embarrassment. He keeps his focus, and roles the nipple around his tongue. Using his senses, he takes the other one between his fingers. It's satisfying when Karma actually gasps, arching into it even more. Nagisa can't help but wonder what Karma's thinking in the moment, whether he's aware of how much he's reacting. Somehow this feels weirder than blowing him.

Focusing in isn't the point of this lesson, he's supposed to be exploring all of Karma's body, but Nagisa really likes that he can draw such whimpering noises out of him. He's not sure at all why he feels this way, but heat starts to stir in his own crotch again just listening to him. He notes that Karma hasn't actually stopped him, either.

He almost feels reluctant when he moves away, sitting back up to get a better look at the situation. The way Karma's spawled out, head tossed back with his eyes squeezed shut… he almost looks… submissive? A wave of something comes over Nagisa, but he swallows it down, and instead traces Karma's annoyingly prominent abdominal muscles.

It's like Nagisa managed to hit some kind of sensitivity button, because he jolts into that too. In fact, glancing down, his erection almost looks painful. He doesn't reach for it, though, finding the fun in taking his time. He shuffles back and bends down again, letting his lips find where his fingers just were, and almost by instinct his tongue jolts out too.

His legs are shaking, actually. Nagisa doesn't get it, why he's acting so sensitive today, when he's usually pretty capable of keeping a straight face and balanced tone through most of it. It makes pride swell within him, though, and Nagisa wants it badly. He's not sure entirely how to put into words what he wants, but this feels like a decent representation.

Karma squeaks, when he licks down the lines of his stomach, and he feels even more pride. Actually, the flavour of sweat isn't the most pleasant, but it's no more than a background thought. He just continues, until eventually he actually is at the base of his erection. Nagisa knows there's a lot he hasn't explored yet, but he feels a little bad about dragging it out for longer.

A sigh of relief comes from Karma, by the time he wraps his lips around him. Nagisa's noticed that he's actually pretty gentle with him usually, but he fists into his hair with urgency. For some reason, Nagisa likes the burning tug at his scalp, and can't help but produce a moan of his own, speeding up with even more vigour.

Suffice to say, it doesn't take Karma long at all to finish.

Nagisa's worn out afterwards, after everything that needs to has been cleaned. He's learnt the hard way by now that you really don't want to let semen dry on anything, especially someone elses. Somehow, that's just inherently more gross. They both just lie there afterward, though the atmosphere doesn't feel uncomfortable.

"Do you," Karma clears his throat, "want to see if your finger combinations are better?"

"Sure."

They turn away from each other as they redress. Nagisa's clothes came off before their activity started, so they feel fine to put back on again. Maybe it's weird that they give each other privacy to redress… but anything resembling intimacy seems to be off limits, just like kissing had been until recently. Kissing feels like a major part of it for him, though.

Then they find themselves on Karma's living room sofa, controllers in hand like the last hour hadn't actually happened. If this didn't happen so regularly, he might actually start to believe it was some kind of elaborate fantasy. Not that Nagisa has a reason to fantasise about Karma doing that kind of stuff to him.

Still, the thread of thought is there now, and even though they only just got off, he looks at him and his mind starts to wander. Karma's hair is a little sweaty, sticking to his forehead, and the jumper he threw over his loose bottoms is fairly low cut, showing off his whole neck line. In particular, he stares at one of the red marks that's still there… and wonders if it'll turn into a bruise.

It's not weird to admit to himself that his friend's attractive. In fact, with someone like Karma, it would be weirder to deny it. That would he imply he has something to hide. So sure, there's a lot about Karma that definitely has mass appeal. His face is nice and well proportioned, and his body is honed.

But Nagisa shudders, then, because there's something else there. There's a difference between being aware of Karma's attractiveness, and being personally attracted to him. And maybe there's a part of him that can close his eyes and pretend that it could be anybody's hands or mouth on him… but there's just something so deeply Karma about it all, he can't forget. A twinge in him wonders if he even wants to.

"I want to go further," Nagisa says. "We've done everything else now, so we should go the full way."

Karma drops his controller.

Embarrassment washes over him, before Karma gets the chance to speak. "I-it's what this is all building up to, isn't it?"

"You just surprised me," Karma's voice sounds a little strained. "Are you sure?"

He thinks for a moment. "If it's inevitable."

Karma turns to him, really staring him down. "That's not a good reason. If it matters to you, you shouldn't just do it because you feel like you have to."

"Was it a big deal for you?" He feels awkward even asking such a thing. "The first…"

He just shrugs. "Made me realise I'm not into girls."

Nagisa splutters. "You-"

"It's been weeks of this," he says, "don't say you're surprised about that. I wouldn't be so happy about giving you blowjobs if-"

"Don't be so nonchalant about it!" He gets to his feet for some reason.

His eyes sharpen up, though the joking mood is still there. "Does it really bother you that much?"

Nagisa hesitates. "No…"

"You know," he says, "it would be pretty gay if we had sex."

And now Nagisa wants to scream, and not in a good way. Why is Karma like this?! Just so… ugh! He doesn't even have the words because Karma goes beyond that. He's… insufferable, by any means. And Nagisa knows he's doing this on purpose now. But he can't help his face from turning scarlet, even if he's technically the one who brought it up in the first place.

Words like "gay" don't mean that much to him. Compared to being teased for his girlish appearance, something like that doesn't bother him much. But sex hadn't anyway. Sure, there was the expectation that he should be drooling at the sight of boobs that followed most teenage boys, but he either hadn't cared, or felt disturbed over that kind of thing. Then again, men hadn't had any kind of effect on him either. The physical desires had certainly been there, but they weren't directed at anything. Not until now.

"Do you want to?" He mumbles.

Karma stands up too, which is just a reminder of how much taller than Nagisa he is. "I said I was going to teach you everything, didn't I?"

"Yes," he swallows.

"You really think I'd agree anything I didn't want to do?"

Well, he has a point. But it's hard for Nagisa to concentrate, with the way he looms over him. "You know I wouldn't either!" It bursts out of him. "I wouldn't say it if I didn't mean it! And, and! I don't go down half assed!"

Karma just looks amused. "Why do I feel like you just declared war on me? Alright fine," like it's a chore or something, "we'll do it next week."

"Don't just-"

His head tilts innocently. "What?"

"Schedule it."

His face morphs, and he makes a show of prodding his lip with his finger. "Come to think of it, I'm probably out of condoms at this rate. And I haven't bought lube in a while… we'll probably need a lot of that. You'll pick them up before you come, won't you?"

Nagisa grabs a cushion from the sofa, honing all of his assassin's reflexes. Perhaps Karma's a little rusty, because he gets a pretty good hit on him. Considering Nagisa's lack of physical strength, it really isn't enough to knock him back in any way, but it's satisfying so he does it again. Then Karma reaches behind him and returns the treatment.

They end up sprawled together on the sofa, somehow, laughing and panting wildly for breath.

"I meant it you know," he says.

Nagisa finds himself nodding. "So did I."

He nods, and picks up the controller, resuming the video game as though that discussion wasn't anything. "I was winning."

"I know."