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It’s such a cute concept ugh I love them and I love beta!Omi so much

Thank you!!!

Atsumu grins.

Heat, Samu’s, then the courthouse.

Sounds like a plan.

/fin

idk I got this brainworm so here

No, they haven’t been dating for very long, but Atsumu’s never been more sure of anything in his life. Kiyoomi is it for him.

Maybe he’s crazy, but calm rationality is overrated.

“Come and show me how much you mean it, Atsumu,” Kiyoomi says as he falls back into the bed. +

Kiyoomi laughs, a little breathless. “We’ll go straight there after your heat, then, but your brother would kill you if you didn’t tell him first.”

This is true. “Okay. Samu’s, then the courthouse,” Atsumu amends. +

“You’re a fucker for doin’ this when I can’t drag ya down to the courthouse right this fuckin’ second,” Atsumu growls, digging his fist into Kiyoomi’s shirt and pushing him towards the ugliest nest in the world. +

Atsumu huffs. “Fuck off.”

“Did I hear wrong?”

Finally, Atsumu peels himself from Kiyoomi. “What would ya say if I told ya that you heard right?”

Kiyoomi smiles, soft and perfect. “I’d say yes, of course.”

Fuck. +

Kiyoomi seems to relax at that, and his subtle scent spikes ever so slightly. “Well, maybe I have a little idea. What was that other thing you said?”

Now it’s Atsumu’s turn for his face to warm. “Nothin’.”

“Really?” Kiyoomi taunts. “Because I thought I heard a proposal.” +

Stiffening, Kiyoomi breathes in, likely to justify himself, but Atsumu barrels on.

“Don’t take it personally. Only omegas make good nests. The fact that ya even tried means more to me than you’ll ever know.” +

“W-Well,” Kiyoomi says, rubbing his hand soothingly along Atsumu’s back, “I just wanted you to feel comfortable, but…” Atsumu feels Kiyoomi’s throat move as he swallows. “Did you say hideous?”

Atsumu nods. “Oh, yeah. It’s fuckin’ terrible, babe.” +

Atsumu knows that if he looks up at Kiyoomi, he’ll see bright red ears, but Kiyoomi will see glassy eyes and a sniffly nose, so he supposes they’re even. +

Without warning, Atsumu wraps his arms around Kiyoomi’s body, nearly squeezing the life out of him and burying his face in Kiyoomi’s soft scent. “Thank ya,” he mumbles into Kiyoomi’s shoulder. “No one’s ever done anything like this for me before.” +

“It’s hideous,” Atsumu breathes out as tears come to his eyes. “Marry me.”

Kiyoomi recoils twice. “H-huh? What?” +

The whole thing is weirdly muted in scent, and Atsumu can barely pick up Kiyoomi’s mild lavender scent despite it being his own bedroom.

It looks less like a nest and more like a tiny, poorly-walled city, and it’s the sweetest thing anyone has ever done for Atsumu. +

There are also the washed jerseys he’d “borrowed” from Hinata and Bokuto during his last heat and forgotten to return, completely devoid of any lingering scent from the two. +

The clothes and items are arranged in even spaces around the exact periphery of the bed. Atsumu sees some familiar items; Kiyoomi must have gone by his apartment to pick up the fox plushies that are scented like Inarizaki, but they’re spread weirdly apart and not like pack. +

Kiyoomi sucks in a breath right as Atsumu is opening his bedroom door.

“Oh, well I…”

Atsumu’s jaw drops.

On Kiyoomi’s bed—complete with its usual military cut corners and bleached white sheets—is the worst fucking nest Atsumu has ever seen. +

Atsumu smiles at him, squeezing his shoulder as he moves past, heading for the bedroom. His cramps are already killing his back. “For what it’s worth, I think it’ll be fine. It’ll suck havin’ to go without a nest, though.” +

—

“Thanks for bein’ willin’ to have me stuck here for a few days, Omi,” Atsumu says, toeing off his shoes in the genkan. “I know how you are about your personal space.”

Kiyoomi’s mouth twists strangely. “I mean… of course I want you here. It’s you, after all.”+

Kiyoomi nods, smiling softly to mask the panic that’s starting to make his heart fibrillate. “Sure. Now close your mouth and swallow before you get rice all over my fucking face.”

When Atsumu is distracted, he takes a deep breath: there’s so much work to be done. +

“Great, sick, awesome. Cool, even,” Atsumu blabbers. “Then, uh, I’ll come over tomorrow after pickin’ some stuff up from Samu’s?” +

“Y-Yeah, sure,” he blurts, ears warming. “Of course. You can have your heat here.”

The beam he gets from Atsumu is enough reward in itself, and it almost distracts Kiyoomi from the way he rubs his surely-sweaty palms on his pants. Did he really think Kiyoomi would say no? +

This is a big deal, Kiyoomi knows from his research. Atsumu is not just sharing his heat, he’s bringing it to Kiyoomi, letting himself be at his most vulnerable in Kiyoomi’s home. His heart thuds wildly at the realization.

“Omi?” +

“Yeah, it starts tomorrow.” Atsumu rubs the back of his neck. Kiyoomi frowns; he’s nervous. “I, uh, was hopin’ I could spend it here?”

Oh. +

“So turns out,” he grumbles through his rice, “there’s a plumbin’ issue in my building? An’ one of the pipes fuckin’ exploded, so we all got kicked out.”

Kiyoomi swallows. “But your heat…” +

It was strenuous work, but by the second heat they’d shared together, Kiyoomi had grown confident in the routine.

Which is why his heart falls out of his ass when Atsumu tells him the bad news at their weekly dinner date. +

Kiyoomi packed a bag full of clothes, snacks , and medicine, then spent a few days largely trapped in Atsumu’s nest, doing whatever he needed—whether that be sex, cuddles, massages, or nourishment. +

The courtship phase lasted a month until Atsumu’s heat had arrived, and he had asked Kiyoomi to spend it with him, consummating their official relationship. Since then, Kiyoomi has only spent one other heat with Atsumu, which went swimmingly. +

Atsumu had blinked seven and a half times before he burst out into laughter, a bright smile on his face. “Ya got me there, Omi.” He then pressed a kiss to Kiyoomi’s cheek, and it burned like a hot poker. “Thank ya for the gift.”

That was seven months ago. +

“I know you won’t replace them until they’re literally falling apart,” Kiyoomi had said hastily, “but the support has worn down, and I can tell they’re bothering you when we walk over the gravel.” +