Work Text:
"Let me try and get this straight. You and Rintaro swore that if you weren't married by thirty then you two would get married? The same Rintaro who is married to your brother." Kiyoomi wasn't sure what was more surprising, that his boyfriend remembered something from fifteen years ago or that Rintaro actually accepted. Actually, he could see Rintaro half trying to make Atsumu feel better and half setting him up for a long running joke.
It was five a.m. The day of his boyfriend’s birthday and normally Kiyoomi wouldn’t mind being awake this early if Atsumu wanted more time together. However, he was not happy to be awoken because Atsumu wanted to bring up a fifteen year old joke that Rintaro probably didn’t even remember and would end up getting the twins in a fist fight over Rintaro’s hand in marriage.
"Yep and I'm not married." Atsumu’s purred rumble was suspicious, especially as his fingers started to slide over Kiyoomi’s arm in a soothing manner that always melted him.
His boyfriend knew him too well, Kiyoomi confessed to himself. Even as his suspicion increased, it immediately started to wane at the steady and gentle touch. It was a weakness that Atsumu took advantage of too often and one day Kiyoomi would be able to ignore it, but that day was not today.
"We're dating.” Kiyoomi reminded him, muffling a yawn into his hand.
He would have purred if he could, as Atsumu’s hand slid up to cradle his cheek and thumb over his cheek bone. Atsumu was definitely up to something, Kiyoomi knew, but if he kept spoiling Kiyoomi like this then Kiyoomi would be forced to give him whatever he wanted.
Which was probably the point.
"But we're not married!" Atsumu grinned like a cat, eyes scrunched up and teeth bared to the world.
Kiyoomi watched him through slitted eyes, on the verge of falling asleep again. What did Atsumu even want from him?
Normally Atsumu was blunt, and could be even more blunt than Kiyoomi himself at times. He was good at just asking for what he wanted and waiting for Kiyoomi to give it to him (Kiyoomi would be embarrassed but he couldn’t bring himself to care at the end of the day, Atsumu was his to spoil so why not?).
"Rintaro is already married to Osamu." Kiyoomi tried again to knock sense into this bizarre conversation, muffling another yawn. His lips twitched up slightly at Atsumu’s quick kiss to his temple.
"Yep, that divorce will be messy."
That was an understatement. Even if Osamu decided to go along with the joke, there was no way he would give up Rintaro’s hand without a fight. He’d challenge Atsumu to a duel and tackle him to the ground the second the shop closed, or add an element of surprise by attacking him mid lunch rush. Rintaro wouldn’t be any help either and would egg it on by saying whoever won got to marry him forever.
Kiyoomi finally opened his eyes and stared at his boyfriend, tired mind slowly trying to understand literally anything at this point. "What?"
"In my defense," Atsumu leaned in enough to kiss Kiyoomi's nose "we both thought I would never get a date that would want me more than a week."
Normally, this was where Kiyoomi would grumble that no one understood how to appreciate Atsumu properly and would promise to love him forever with an extra two thousand kisses for his birthday. But with the five am wake up and his boyfriend potentially breaking up with him for a fifteen year old joke, Kiyoomi couldn't really say he didn’t understand why someone would break up with him. Kiyoomi would never do it, but he understood.
"You're not breaking up with me for your brother's husband." Kiyoomi said instead, blunt and to the point and Atsumu gave a cheshire grin that spelt trouble.
"But I'm not married yet, so I have too unless someone for some reason decides to propose." He purred and- Gods Kiyoomi hated how much he loved him.
He had a proposal planned. An entire grand proposal that would out do both Komori’s and Osamu’s and cement his position as the best Miya husband in Atsumu’s mother’s eyes and, hopefully, would win over Ojiro’s favor too.
Kiyoomi had planned it perfectly to give Atsumu every thing he’d ever mentioned wanting in a proposal over the last eight years. Horse riding on the beach, MSBY on one side and Inarizaki on the other over dinner at Atsumu’s favorite restaurant, slow dancing. In one fell swoop Kiyoomi was going to give Atsumu the best damn proposal and make him cry and now Atsumu wanted him to ruin it for something stupid. Hell no.
"Fuck you." He said, closing his eyes again only to immediately be assaulted by Atsumu's tugging of the pillow from him. Kiyoomi pressed his head against the pillow harder, refusing to let Atsumu win especially when he had stopped using his special weapon of pets.
"I know you bought a ring but I can't find it, tell me where it is."
"You will get it when I propose." Kiyoomi yawned, purposefully blowing it in Atsumu’s face this time. He was going to give him the proposal he deserved, not a messy five am, sleep deprived, barely remembered proposal.
"Okay but... you only have until tonight or else I have to marry Rintaro, it's the law." Atsumu tried again, staring Kiyoomi down to try to break him so Kiyoomi kept his eyes closed. Like usual, Atsumu broke first and threw himself into Kiyoomi's arms latching on like a koala. He snuggled in like a needy dog looking for attention.
"Why don't you love me?" He pouted into Kiyoomi's collarbone. Kiyoomi didn't bother to answer at first, tucking his arms around Atsumu to hold him in place. He breathed in the familiar scent of shampoo and hair dye, warm with affection even if he wanted to kick Atsumu out of bed for waking him up so early.
"I love you." Kiyoomi promised with a kiss to his head. "But you're a brat."
"Okay well now I really am marrying Rintaro, he wouldn't do this to me."
"He'd be ten times worse, don't lie to yourself. Why do you want me to propose already?" Kiyoomi asked, wondering what stupid thing Atsumu had done that he couldn’t just come out with it.
Atsumu fell silent, a lengthy suspicious silence that had Kiyoomi rearing back to eye him. It never took him long to crack, especially when Kiyoomi stared him down.
"I already told 'Samu that we were engaged." Atsumu finally blurted, pouting at Kiyoomi's glare.
“ Why ?”
"Because I was going to propose three weeks ago but then I lost the ring but I already told Samu I was going to do it. Then he asked and I panicked and said you said yes. Then you came home all suspicious and I was checking the bank account, y'know the one I use for Netflix, because it got declined and I saw the purchase for the ring, and I realized you got a ring and babe don't make me into a liar and marry me already before birthday dinner with Rin and ‘Samu."
Atsumu's lips were pressed in a pout, bottom lip trembling and eyes wide like a puppy asking to be forgiven and Kiyoomi was nothing if not weak to those beautiful eyes. There wasn’t anything he wouldn’t do for them, or to make Atsumu smile instead. He supposed this was his own fault for using the wrong card, otherwise he wouldn't be awake at five am because Atsumu would never have known and would have to come clean.
By all rights, Kiyoomi should make him come clean anyways, but he was nothing if not an Atsumu enabler. He could only say no when it meant teasing Atsumu and even then he’d give in after a few minutes of prodding or pretty lashes fluttering.
Besides, it would make a wonderful wedding story and Kiyoomi could get his revenge then.
"The cupboards above the fridge." He said after a few seconds of pouting. Atsumu's head tilted. Kiyoomi’s heart was going to burst, so he kissed him instead to keep himself from doing just that.
"What?"
"The ring love, it's in the cupboards above the fridge.” Kiyoomi said, voice sweet and fond at Atsumu’s bewildered look. The words finally clicked and Atsumu brightened like the sun itself.
"Damn that’s a good place, I’d never think about that.”
"Go get the ring." Exasperated, Kiyoomi let go and shoved him out of the bed when Atsumu stayed latched onto him.
Atsumu hit the floor feet first and immediately took off with a cheer. Kiyoomi pulled the covers up again, rolling his eyes at the dramatics. He was going to be with his favorite idiot for the rest of his life, and honestly that sounded like his own perfect birthday gift.
He was smiling into his pillow, he knew, but what was he supposed to do when he could hear Atsumu gasping and prancing around the kitchen in excitement. It was barely a minute later but he found himself with Atsumu in his arms again, ring safely on his finger.
"I love you." Atsumu rumbled, nuzzling adorably under Kiyoomi's chin. Kiyoomi squeezed him once and closed his own eyes.
"I love you too." He murmured. "Now go back to bed and wake up at a reasonable time. What kind of monster wakes up this early on their birthday?"
Atsumu hummed and pressed as tightly as he could against Kiyoomi.
“You forgot to wish me a happy birthday. Can’t sleep till then.” Atsumu mumbled against Kiyoomi’s collarbone, hot air making him shudder. He was such a brat.
“Happy Birthday, love, now sleep or I’m smothering you with a pillow.” Kiyoomi yawned into the pale hair, eyes drooping shut.
Something bugged at his mind though and he cracked open his eyes, wondering what it was. Then something Atsumu had said finally got through his tired mind.
"Wait. You lost my ring?"
"Shhh, sweet heart, we're engaged and you love me. Go to bed." Atsumu crooned, holding onto him tighter like he could hug Kiyoomi into forgiving him.
"I can't believe you lost my ring." Kiyoomi complained, pinching Atsumu hard enough to make him squeak and wriggle. Then he gave in as Atsumu thought he would and closed his eyes. "You owe me"
"Make it up to you on the wedding night baby.” Atsumu mumbled against his skin, unaware that Kiyoomi was planning his revenge for the next few months.
"You're lucky I love you.” Kiyoomi hissed, only to erase any venom with three nuzzled kisses against Atsumu’s head.
“The absolute luckiest.” Atsumu agreed, fingers sliding slowly against Kiyoomi’s skin and pressing a kiss against his collarbone. Kiyoomi’s chest flared with affection and he supposed he could lower his revenge for just the wedding rather than the next few months of loving harassment.