Archive of Our Own ^beta

Kiyoomi has never wanted his heat to arrive more than he does now. 

Like yes, sure, he’s still dreading the painful days to come and the fact he’ll have to ask for a few days off so he can spend them at home, but he’s also sorta waiting for his heat to finally hit.  And it definitely has nothing to do with the fact that he wants to have his guts rearranged again. Definitely not. 

Except he does. He very much does. Sue him, okay? He’s horny. More than he thought he could be. 

He hadn’t had sex in a long while before Atsumu, and ever since that night, instead of quenching his thirst, it had gotten worse. It is as if he had been doing just fine without sex for so long that he had forgotten how good it could be when his sexual partners weren’t total assholes. And now that he had a good experience again, he wanted more. 

Technically, he could call Atsumu and ask him to meet up whenever. They were friends with benefits, after all. That’s what friends with benefits did. Or so he guesses. Kiyoomi has never had many friends, let alone ones that benefit him. 

But he doesn’t know where they stand about that. Since their whole arrangement revolves around Kiyoomi’s heat, he doesn’t feel like asking, “hey, how often can we have sex?” Right out of the bat. Atsumu had been insufferable enough after their first encounter for Kiyoomi to feed up his ego even more. 

“I can’t believe you really have a schedule for your heats,” Atsumu had said, his eyes glued to his phone as he skimmed the google sheet Kiyoomi had emailed him. 

“Don’t you?” 

“Scheduled my ruts? Nah, I have an app that tells me when they should hit, I don’t actually… plan them.” 

Kiyoomi looked at him. “Must be nice. Anyway, my next heat is in two weeks, you should ask for at least the first 2 days off.” 

Atsumu put his phone away then. “Only 2 days? It says here your heat goes for 4 whole days.” 

“I won’t need you for the whole four days.” 

Another alphas would’ve been a little annoyed by Kiyoomi’s tone, but Atsumu never seemed to be. He found everything exciting, as if it were an unexpected challenge. It both annoyed and excited Kiyoomi. 

“Think ya’ are gonna tired me out?” 

Kiyoomi rolled his eyes. “Just ask for the days off. But don’t say it’s because of me… just make an excuse or something. I don’t want the whole team knowing.” 

Atsumu nodded. “As you wish, Omi-kun.” And then winked at him. 

That was a few days ago, and Kiyoomi has been quite literally counting off the days until his heat starts. Checking up his calendar and being very well aware he still has a full week to go before he can have that itch scratched. 

He’s a little nervous, too. It’s not like he hadn’t had sex before— he has, that much is obvious. But he has never shared his heat with someone else, and he’s not sure what to expect. Part of him fears he might be too much, and that even 2 days will be a lot for Atsumu, and he won’t want to keep this up with him after this. 

Another part of him thinks that it’s too intimate. That having sex is one thing, but inviting his teammate to essentially fuck him for two days straight might be too much and change their friendship dynamic for good. Although he doesn’t really think that’d be an issue. Atsumu has been exactly the same since they had sex; if anything, he’s a little bit more cocky. Nothing out of the ordinary. 

It’ll be fine. He’s sure. Nothing has to change between them, and no one else has to find out they’re doing this. It’s going to be fine.

—- 

To Kiyoomi’s horror, the whole team can tell he had sex almost right away. 

He is sure he’s acting like he usually does, but apparently, his humor has significantly improved, because he’s getting all sorts of insinuating smiles from his teammates. As if they’re all saying good job for getting laid, dude. 

Bokuto even gives him a fucking pat on the back that feels a little more enthusiastic than usual. 

“I see you are in a good mood again, Kiyo! Good for you!” His hand is heavy as it comes down on his back, almost making Kiyoomi cough up a lung. 

He tries not to be an asshole and shove him away and instead just steps aside. “Sure, Bokuto.” 

It doesn’t get much better when Hinata approaches him after practice, wearing the same polite smile he did when he first told Kiyoomi to his face that he needed to get laid. 

“So, hm, you went on the apps. Did they help?” 

Kiyoomi looks up at him from where he’s sitting on the bench. “What does that mean?” 

He knows what it means. He knows what Hinata is asking, but it is insanely entertaining to see him squirm just a little bit under Kiyoomi’s gaze. Sometimes Hinata is too polite for his own sake. 

“I mean… You know… it looks like you used them.” 

“Yeah?” Kiyoomi raises an eyebrow. “How so?” 

“Well, don’t take this the wrong way, Sakusa-san, but everyone can tell. It’s like… You are a little less ass-holy than before, and your scent stopped being that strong.” Hinata says, sharing a quick smile. “Whoever you ended up matching with sure is good to you.” 

A few lockers down the room, Atsumu closes his locker door with a little too much force, almost dropping his gym bag. Kiyoomi makes a point not to look at him. He doesn’t need Hinata (or anyone, really) to know that Atsumu was good to him. 

“Anyway,” Hinata continues, thankfully not picking up on the whole thing. “I’m glad they helped! Just… be sure to be careful, okay?” 

Kiyoomi gets up then, grabbing his bag. “Don't worry. I am.” 

Thankfully, no one else comes to talk to him about how happy they are that Kiyoomi is having sex, or he would explode. However, Atsumu is waiting for him outside the gym when Kiyoomi emerges, that annoying smile that Kiyoomi knows so well by now adorning his stupid face. 

“So… I’m good to ya’, huh?” Atsumu is grinning now, bumping Kiyoomi on the shoulder. 

“Shut up.” 

“Nah, I don’t think so. Ya didn’t hear half of what I did. Everyone is praising me for fucking the brat out of ya.” 

Kiyoomi can’t help but roll his eyes at that. “They don’t know it’s you.” 

Atsumu doesn’t seem to care. “Praise is still praise.” 

“If you keep gloating, I won’t let you fuck me anymore,” Kiyoomi says, rounding up the corner. 

That shuts him up right away. 

—

An excruciatingly long week after, Kiyoomi’s heat finally hits. 

Both he and Atsumu had requested days off. Separately, of course, so no one would find anything out. Although based on the look Coach Foster gave him, it was obvious they weren’t fooling him. Kiyoomi had requested the whole week off first, just in case. His heat only lasted 4 days at most, but he knew he’d need the other days to get his shit back together. 

A few days later, Atsumu texted him to let him know his days off were also approved. 

Miya Atsumu:

All good to go Omi!! 

Our sex date is official now 

>> Please don’t call it that 

Miya Atsumu: 

U are not fun 

>> whatever

>> Make sure to bring condoms. 

Miya Atsumu

Already ahead of you 

His text had been followed by an attached picture of extra-large textured condoms. For fun, Atsumu had said when Kiyoomi asked why on earth he would get those. He didn’t text him back after that. 

The days that followed were bland and inconsequential to Kiyoomi. He woke up, went to work, trained for hours on end, came back, and repeated. Every day, the itch beneath his skin grew a little bit more, that small fire in his lower stomach growing with it. 

Now, Kiyoomi is about to bounce off the walls, to be honest. There’s this almost frantic energy in him that he doesn’t like, but that always comes with his heats. A restless sort of energy that would’ve had him crying out in frustration long ago if it wasn’t for the fact that he knows Atsumu is on his way. 

He is a little self-aware of how horny he is and how his scent must smell to anyone who sniffed him right now. He would be ashamed if it were anyone else, but it’s Atsumu he’s talking about; if anyone can handle him, it’s probably Atsumu. 

Kiyoomi did try to get off earlier in the day, just to get the edge off and not be so… bouncy when Atsumu arrived, but that didn’t work. If anything, it had made him even more eager for the real deal. 

The doorbell rings, and Kiyoomi is basically on Atsumu the second he gets in. 

“Bedroom. Now.” He says in a way of hello. A little rude, but Atsumu will get over it. 

Behind him, Atsumu laughs as he kicks off his shoes. 

“Hi, Atsumu, how are ya’? I’m good, Omi-kun, thanks.” 

Kiyoomi rolls his eyes, only then stopping to actually look at Atsumu. Who looks extremely handsome in grey sweatpants and a muscle tee, but that’s just the hormones talking. 

He ignores Atsumu’s sarcasm. “You did shower before coming here, right?” 

“Hmm. Fresh and clean, just like ya’ asked me.” Atsumu smiles. He’s carrying a small gym bag with him, an overnight bag Kiyoomi had told him to pack. They were about to spend two whole days together, after all. “Where do ya’ want me to put this?” 

“You can put it in the bedroom. Now, c’mon, I need to get fucked.” 

“Geez, you’re making me feel like a sex object,” Atsumu says, faking offense as he happily marches behind Kiyoomi. 

“Sex objects don’t talk.” 

“Kinky,” Atsumu says, that annoying grin on his face. “Didn’t know ya’ we’re into kinky shit, but I could be down for it. Wanna muzzle me, Omi-kun?” 

If Kiyoomi could roll his eyes further, he’d be looking at the inside of his skull by now. Still, the idea of a muzzled Atsumu makes something throb between his legs and causes his scent to pick up. He hopes Atsumu does not notice that. 

“I’m thinking about it,” He says, hoping he can mask the truth with sarcasm. He points to the furniture by the wall. “You can leave your stuff there. Did you bring the condoms?” 

Atsumu steps into his room, then, leaving his bag where Kiyoomi said. It's obvious he’s taking a look around, probably comparing what Kiyoomi’s bedroom looks like to whatever version he had in his head about it. 

“Yeah, right here,” Atsumu pulls the package out of his bag, handing it over to Kiyoomi. “Huh. No nest?” He adds, pointing towards the bed. 

Kiyoomi looks at his bed in reflex, even though he already knows there’s nothing there. He’s never been one to make nests. All of his stuff is already in his apartment, and he’s never had a partner (or anyone, really) that he’d want to take things from to build a nest in the first place. 

“I don’t see the point of them,” Kiyoomi says, not feeling like explaining everything else. “Why?” 

“Nothing. Just curious.” Atsumu shrugs, not pushing the matter. Instead, he returns his gaze to Kiyoomi. “How do ya’ wanna do this?” 

Finally. “I want to ride you while I still can. I get exhausted and whiny during my heats, so you will have to take over at some point.” 

Atsumu smiles, already starting to undress. “Got it.” 

“No biting,” Kiyoomi reminds him, even though he knows he doesn’t need to. Weirdly enough, he trusts Atsumu with this. 

“I know, I know.” 

Kiyoomi can’t help but look at Atsumu’s body as he makes himself comfortable on his bed. Strong legs stretched out, and his dick already semi-hard as Atsumu slowly strokes the condom on, keeping his eyes on Kiyoomi. 

“Are you joining me or just watching?” 

Whatever smart reply Kiyoomi would’ve said in any other moment no longer exists in his mind as he suddenly feels a need to have Atsumu in him. His body temperature is rising, and his whole skin seems to sizzle with anticipation as he gets naked too, getting rid of his clothes in favor of climbing on his bed and on top of Atsumu at once. 

Atsumu’s hand settles on the curve of Kiyoomi’s hip, big and warm and grounding as he just looks up at him. There’s no doubt that Atsumu can sense the arousal in him, that he can also feel how needy Kiyoomi is, but he doesn’t do anything about it. As if he’s enjoying the tension between them just as much. 

Kiyoomi slaps Atsumu’s other hand away from his cock, and instead uses his own to guide the head towards his entrance. There’s a second where they both breathe in, and then Kiyoomi is looking directly at Atsumu’s eyes as he sinks down in one go. 

—

It isn’t enough. 

It isn’t enough, and it’s making Kiyoomi want to cry. Which is something he never does. Ever. But he’s on his heat and he has ridden Atsumu twice in the last god knows how many hours, and he’s getting restless because it isn’t enough. 

It is not that it’s bad in any way. On the contrary, Kiyoomi had come with little tears in his eyes the very first time when he climbed on top of Atsumu a few hours ago, and just a little bit ago he had cursed and drooled on the crook of Atsumu’s neck as he rode him again, his legs cramping on each side of Atsumu’s lap as he clung to him. 

It had been amazing. Atsumu had been great both times, but it still wasn’t enough. 

Kiyoomi can’t pinpoint what is it that is bothering him. What is it that he’s missing, and why does his body feel so on edge despite being fucked out of his mind twice in one night. His heat should’ve calmed down by now, and instead, it’s like there’s this pressure inside of him, and he doesn’t know how to let it out. 

“Omi-kun,” Atsumu’s voice is soft next to him on the bed. It startles him for a second; he thought Atsumu was asleep. “Ya’ okay?” 

“Yes.” He lies. “Why?” 

There’s a shift in the bed, and Kiyoomi turns around to find Atsumu sitting up, looking at him. 

“Okay, don’t bite my dick off but… I think there’s something wrong,” Atsumu says, as gently as he can. “This is obviously not working out.” 

Oh. That hurts more than Kiyoomi even thought it could. He’s quick to sit up on the bed as well. 

“You’re right. You can go, I—,” 

“Whoa, whoa,” Atsumu chuckles, raising his hands in defense. “I ain’t talking about leaving. Why would ya’ think that?” 

Kiyoomi blinks up at him. “Then what are you talking about?” 

“About this!” Atsumu points at their very naked selves. “Look. It’s obvious that jumping my dick isn’t getting you what you need. You’re an omega… an omega in heat… I think it’s pretty damn obvious what your body is telling you it needs.” 

“I don’t follow.” 

Atsumu looks at him, as if he can’t believe Kiyoomi is this dense. He sighs, long and deep. “Omi-kun. You need to get knotted. And I have a knot. Put the rest together.” 

“Oh.” 

Kiyoomi’s already hot cheeks blush at that. Right. He didn’t know why it hadn’t occurred to him when it seemed so obvious. It might be because he has never actually gotten knotted before. Has he had sex before? Yes. He’s not a virgin. But being knotted always felt too intimate for him just to do with a random person. 

Atsumu is still looking at him, waiting for Kiyoomi to say something else. 

“I have never tried that.” He admits, not seeing the point in hiding it. 

“Ya’ never—,” Atsumu shakes his head. “But then how have you—shit. Your heats must really suck.” 

“Pretty much.” 

“I think,” Atsumu says, slowly. “That’s what ya’ need. I don’t know how ya’ went so many heats without it, but it’s probably why they suck so much. Ya’ need to get knotted.” 

“Stop saying knotted.” 

“Sorry.” 

“I can… try,” Kiyoomi says, ignoring the tingle of excitement that goes through him at the thought. “It just all seems so intimate.” 

“Yeah, well, having sex kinda is. And you’re in heat, your body probably needs the closeness.” 

Kiyoomi snorts at that. “You were balls deep in me a few hours ago. How much closer can it get?” 

“Oh, Omi-kun. Ya have no idea.” 

For some reason that Kiyoomi is not willing to explore when his body is bursting with hormones, that irks him the wrong way. How many people has Atsumu had sex with? How many omegas that asked for his knot had he pleased? The idea of Atsumu being this smooth with anyone else annoys him, but Kiyoomi chooses to think it just bothers him because he hasn’t gotten knotted yet. 

Well, that can change. 

“Fine.” Kiyoomi groans, already getting up to climb on Atsumu’s lap again. “Just… don’t cuddle me too much afterwards.” 

“Hold on, hold on, hold on,” Atsumu quickly says, putting a hand on Kiyoomi’s waist, this time to hold him back for a second. 

“What?” 

“Why don’t you let me try something different this time?” Atsumu says, voice soft. Kiyoomi doesn’t miss the way he’s thumbing at the soft skin of his waist. 

The heat between Kiyoomi’s legs seems to pool. “Like what?” 

“Like, going on all fours.” 

“You want me to present.” Kiyoomi deadpans. 

“Nah, don’t look at me like that,” Atsumu says, an easy smile on his face. “I’m not trying to put any of that alpha shit. I'm just saying… I’ve heard it feels pretty good like that.” 

“Really?” 

“Look, Omi-kun, we’re not doing anything ya’ don’t want to. But trust me on this one, yeah? If ya’ don’t like it, we switch positions. I’ll let ya’ ride me again. Ya’ look damn good doing it anyways.” 

Part of him wants to push Atsumu down on the bed and ride him again until he gets what he wants, but another part of him, the one that’s tired of putting in the work, the one that is getting wet at the thought of letting this side of him show, wants to trust Atsumu. 

That part ends up winning. It’s easy to trust Atsumu, anyway. 

“Fine.” 

Atsumu moves towards the end of the bed, giving Kiyoomi enough space to settle. He does, scooting to the center of the bed and lowering himself down to his stomach. He takes a second to breathe before getting to his knees, arching his back until his ass is up in the air, and his face is resting softly on the mattress. 

It’s such a revealing position, presenting himself like this. He thinks he won’t be able to take it, but then he feels Atsumu’s hand kneading the soft plush skin of his hips, a hint of awe in his voice. 

“Fuck, Omi, ya are pretty.” 

Kiyoomi has never in his life been called pretty. And the word has an effect on him that he didn’t expect, making his cheek feel hotter than usual. 

“Stop staring.” Kiyoomi breathes out, already feeling shaky with anticipation. He doesn’t think he’ll be able to hold this position for much longer, and he needs Atsumu to get on with it. 

“But ya’ look so good like this,” Atsumu softly chuckles. Kiyoomi thinks that he’s just going to stare at him, and he’s about to turn his face around and tell Atsumu to move when he feels him aligning himself and then slowly pushing in. Kiyoomi instantly melts against the bed. “Good?” 

It’s more than good. Atsumu is already so deep, filling up every inch he can take, and it’s already making Kiyoomi feel a little dizzy in ways he hadn’t before. 

“Yes.” Kiyoomi manages to breathe out, arching his back just a little more. “Fuck me now.” 

“Always a pleasure.” 

The first long and deep thrust has Kiyoomi moaning almost instantly, feeling the ripples of Atsumu’s hips against his ass go through his body, almost making him lose balance. Thankfully, Atsumu has a hand settled heavily on Kiyoomi’s waist, keeping him in place. Which is a good thing, because Kiyoomi can feel his mind slipping with everything thrust. 

Usually, it’d take him a couple of minutes to turn his mind off during sex. As good as it felt, Kiyoomi is always thinking about something. Even when he rode Atsumu all the previous times, it took him a few minutes to let his body take over and turn off his thoughts. 

Now, however, it’s easy. Something inside of him seems to purr in delight, his mind getting fuzzy in the best way possible as his body physically relaxes. As if, finally, he’s giving his body what it so desperately wanted. 

It’s so easy to arch his back and let Atsumu have him, soft, long moans escaping him as Atsumu picks up the pace, hand digging into Kiyoomi’s waist. He tries to fuck himself back into Atsumu’s cock, a more animalistic part of him wanting to be knotted now, but he soon gives that up to flop on the bed. 

“Keep going,” Kiyoomi filthy moans, hands curling to hold onto the sheets. He has half a mind to still offer Atsumu some sort of arch, raising his hips. “Keep going.” 

Atsumu deserves a goddamn medal just for the way he doesn’t miss a single second, and instead switches positions, leaning over Kiyoomi on the bed, placing a hand next to Kiyoomi’s head for support, the other one being grounded on his hip as he continues to thrust fast and deep into Kiyoomi. 

“Yes,” Kiyoomi whines, little tears clouding his eyes.  All he can feel is Atsumu. The presence of his weight just above him, the hot air of his breathing next to his neck, the way his knot is pressing against his folds, already threatening to pop. “Yes, yes, yes.” Kiyoomi moans even louder, every word he ever knew replaced by that single one. 

Above him, Atsumu lets out a groan. He’s been so focused every single time they’ve been together, the sound alone is enough to make Kiyoomi’s scent pick up. Something inside of him wanting more of where that came from. 

“Omi-kun…” Atsumu’s voice was almost as broken as Kiyoomi’s. He didn’t even need to finish his sentence; Kiyoomi knew what he was trying to say. He could feel the knot about to catch. 

“Yes, Atsumu, yes.” 

That is all it takes for Atsumu to grip Kiyoomi with both hands, raising his hips off the bed in a way that has him whining, before he picks up his pace. Kiyoomi is in another plane of existence entirely; he’s not here. His body is melting so nicely against the bed, against Atsumu’s hands, his mind fuzzy and cloudy and a little blank, the only thought going through it is about getting knotted. About Atsumu’s cock and how nice it fucking feels. 

And then he feels it. Atsumu’s knot stretching him impossibly wide and good, and his body taking him in entirely, trapping him as if it doesn’t want Atsumu to leave, ever. 

The sound that comes out of Kiyoomi is whiny and needy, not better than Atsumu’s own moans as he collapses on top of Kiyoomi, breathing hard next to his neck. 

Kiyoomi can’t help but grind his hips back onto the knot settled into him. His body moving on its own accord, marveling at how good it feels. How nice Atsumu fills him up. It’s so good he doesn’t even notice he’s full on rutting against the knot pulsing inside of him until Atsumu lets out a strained groan, gripping Kiyoomi’s hips lightly. 

“Wait, I’m— too sensitive.” 

He lets out a small whine, but stops nonetheless. The fog in his mind doesn’t seem to dissipate like it would usually do. Maybe it’s because of his heat, but Kiyoomi is rather comfortable like this. With Atsumu almost squashing him and his knot pulsing softly inside of him. 

“Omi, I’m gonna move us.” Atsumu softly breathes. He sounds tired, too. “Okay?” 

“Kay,” Kiyoomi says. Or thinks he said. Honestly, he’s not very aware of anything right now. 

He’s barely conscious of Atsumu moving them both. They’re quite literally attached and will be for a good few minutes, so he maneuvers them until they’re on their side, Kiyoomi’s back to Atsumu’s chest. There's a certain distance between them, or as much as it can be considering their situation. It’s definitely not cuddling, but it still makes something in Kiyoomi’s chest feel at ease. 

“Good?” Atsumu asks. He sounds like he’s two seconds away from falling asleep. 

“Hmm.” 

Kiyoomi doesn’t remember much after that, other than Atsumu’s scent filling up his senses and the warmth coming off of his body as he drifts to sleep. 

— 

The next day of Kiyoomi’s heat is a blur in his mind. The first full day of his heat is always the hardest for him. The one where he feels more omega than man. Needy and annoyed and too much even for himself to handle. 

Thankfully, Atsumu is there to help. 

Kiyoomi has a vague memory of waking up before the sun was out and climbing on top of Atsumu’s lap, waking him up so he’d fuck him again. Atsumu had done so, sitting up on the bed and holding Kiyoomi close to him as he knotted him again. 

There are bits and pieces of them spending the rest of the day in Kiyoomi’s bed. He mostly spent it drifting in and out of sleep, waking up hot and slightly sweaty and demanding to have a pulsing knot in him. Sometimes he’d be too tired to move, and Atsumu would take over, not complaining even once. Other times, Kiyoomi would have enough strength and be desperate enough to be the one calling the shots. Atsumu didn’t complain those times either, and would only lie down and let Kiyoomi take what he needed. 

He doesn’t remember eating or showering. As if his mind and body didn’t have any care in the world other than trying to get knocked up. Which wouldn’t happen, of course, but that didn’t stop him from falling for his natural instincts and trying. 

There’s also the memory of Asumu using his mouth while they waited for his knot to be up again. He had sat Kiyoomi on his face and let him grind on his tongue until Kiyoomi stopped complaining. It had worked wonderfully. 

Now, they’re at the end of day two, and Kiyoomi is slowly coming back to his senses. 

The first thing he notices is how sore all around he is. The second thing is the soft material of the hoodie he’s wearing. A hoodie he doesn’t remember putting on, and that he knows isn’t his. 

“Ah, ya’ are awake,” Atsumu smiles. He smells fresh too, like Kiyoomi’s soap. “I didn’t want ya’ to wake up alone.” 

Kiyoomi sits up, slowly. He’s not sure what time it is, but looking at the light coming from the window, it wasn’t that late yet. 

“I’m not a fragile little omega.” 

“I know,” Atsumu says. “But ya’ know, ya are in heat and we just fucked like… a ton. Crashing out is normal.”

“Hm. So is that why I’m in your hoodie?” Kiyoomi asks, pointing at himself. 

Atsumu nods. “Yeah. I figured the scent would help.” 

“How thoughtful.” Kiyoomi takes a better look at Atsumu then. At his wet hair and naked torso. “Did you shower?” 

“Yeah, ya’ were complaining about how disgusting we were, so I helped ya’ out and then I showered too.” Atsumu cocks his head to the side. “Ya don’t remember?” 

Kiyoomi can’t remember shit. His heat-infused brain is as good as that of a fish. “No.” 

“Oh, shit. I did fuck you good, huh.” Atsumu chuckles. 

Kiyoomi is about to tell him to shut up when his stomach growls. He almost forgot they hadn’t eaten anything in two days. 

“Do you want to eat?” He asks Atsumu instead. “I brought takeout beforehand.”

“Yeah, I’m down.” 

It feels weird to put on underwear and shorts after spending a few days fully naked, but Kiyoomi does anyway, getting dressed and decent before going to the kitchen, Atsumu trailing behind. 

He takes out a few containers of takeout food and lets Atsumu help him settle everything down at the table. He knows this period of clarity won’t last all day, and they both should eat and recharge their energy as much as they can. 

Well, Kiyoomi should. Atsumu will be leaving any minute now. He had forgotten about that, and for some reason, the idea of spending the rest of his heat alone makes Kiyoomi’s scent turn the tiniest note sour. 

“Everything okay?” Atsumu asks after he has swallowed a couple of spoonfuls of food. 

“Stay,” Kiyoomi says before he can think too much about it. He can blame his impulsiveness on his heat another day. 

“What?” 

“You can stay,” Kiyoomi repeats, looking straight at Atsumu. “For the rest of the days. If you want to.” 

“Oh,” Atsumu smiles, nodding. “Sure, Omi-kun.” 

Really? That easy? Kiyoomi can’t help but frown at him until Atsumu asks: 

“What?” 

“Just like that? Don’t you have to, I don’t know. Ask for more days off, maybe call the team or—,” 

Atsumu waves him off, smiling. “I already took care of that. I asked for five days too, just in case.” 

“You knew.” Kiyoomi deadpans. 

“That ya’ were gonna ask me to stay? Nah. I had my hopes, though.” 

“You are insufferable,” Kiyoomi says, but the sour in his scent is fully gone now. He’s relieved he won’t have to spend the rest of the heat on his own. 

“Yeah, yeah,” Atsumu shrugs, already immune to Kiyoomi’s sharp tongue. Or maybe he always was like that. He grins at Kiyoomi. “Wanna go for, what, round 10?” 

He does. He very much does. Kiyoomi can already tell he’s starting to get restless, and soon enough, his heat will be in full throttle again. But he has to maintain some dignity while he still has it. 

“Let me finish eating first. Then we can go again.” 

Atsumu smiles. “Got it.”