Despite his appearances, iwaizumi was a lightweight. And he didn't seem to have the decency to at least not drink as much as the other at parties where alcohol was readily available.

So when he was challenged to a drinking game by his kouhai ( his kouhai knowing he would definitely win despite iwaizumi being to years older than himself) he most definitely did not refuse.

Long story short, by his 3rd shot, he was already tippsy and stumbling around looking for oikawa because he had the urge to tell him how "great" he was at drinking games.

Something else you might not know about a certain drunk person is that he is also an emotional drunk, example A, after searching for Oikawa for a good 30 seconds he was crying and wailing, specifically wanting "the love of my life needs to know how good i am so he can be proud of me".

At this point, people had begun pulling out their phones and recording the wailing man in the corner, and akashi had gone to find oikawa, pull him away from the group of people he was talking to and shoved him towards his boyfriend, stomping away while yelling back an angry

"fix your drunk boyfriend, he just broke down because the lack of presence from 'the love of his life' is internally wounding him or some shit!"

Oikawa glared at the yelling boy and muttered under his breath " you could have just let me know he was crying, that would have been enough of an incentive…". He slowly turned around to the problem at hand, where a still crying boy seemed to still not notice he had entered the room.

Holding his arms out, oikawa cooed "iwa-chan! Im right here so dont cry" slowly crouching down and pulling iwaizumi head to his chest, in which iwaizumi quickly melted into the arms wailing his lover's name.

"Oikawaaaa i missed you! Why did you leavvve meee?" still blubbering he nuzzled deeper into Oikawas chest

Oikawa knew it wasn't his own fault at all, and in fact iwaizumi had made it a point to go have and not to worry about him. But he also had dealt with this situation before, and knowing how emotional he got when drunk, he decided against bringing up the fact that it was actually Iwaizumi's own fault that oikawa hadn't stuck to his side.

"Im sorry Iwa-chan, its all my fault right" Oikawa said, knowing what was coming.

"Yeah, it is, im mad at youuuu" said a now cross Iwaizumi ( oikawa had totally called it).

"Im sorry, do you forgive me Iwa chan? I love you?"" said oikawa hopefully avoiding another breakdown

"Yeah, okay… But only because i love you!"

Oikawa couldn't help but sigh in relief, he was so thankful that he wasn't going to have to drag back home a hot mess of a boyfriend.

Or maybe he just spoke a little too soon, because next thing he knew, iwaizumi was slung over oikawa, mumbling into his neck that he was never going to let go of him, and tightly holding his waist.

That was their cue to leave,

Over his shoulder oikawa yelled " we are going to check out for the night!" and walked out of the house ignoring the complaints of his friends saying "oh but the night's still young!" or "why dont you just let him sleep on the couch". The fact they people would think so low as to tell him to leave his emotionally overcome boyfriend on the couch at a loud party while he enjoyed himself angered him. What kind of person did they think he was?

When Oikawa finally got the both of them into the apartment they now shared, Iwaizumi immediately went straight for a beer bottle, and offered one to Oikawa, who kindly refused and pulled the already heavily drunk buy away from the drinks

"Oh no no no- you are going straight to bed to sleep" Oikawa said in his best 'Parental tone' "if you drink anymore your hangover will literally kill you! Drink this glass of water, take this medicine so you don't wake up half dead from the pain and go straight to bed".

" but oikawaaaaa, i want to play with you! Lets go play in bed-"

"- No, let's go to bed. If you're a good boy ill let you cuddle"

"Hai!"

It wasn't like oikawa didnt want to cuddle, in fact, even if iwaizumi had not listened to him they probably still would like they did every night. It was the only way the oth of them could ever sleep well at night, the only place they really felt safe, only in each other's arms.

Dragging him up the stairs, iwaizumi just so happened to trip up word on the last step and hurdle himself towards the unknowing brunette. Now both laying on the floor, iwaizumi ontop of oikawa, oikawa groaning in pain while iwaizumi muttered "sorry…" and began welling tears in his eyes.

Oikawa couldn't help but laugh. Iwaizumi never apologized for anything besides from when he was tipsy, and it wasn't even something he should need to cry for. So placing his hand on top of Iwaizumis head, he pulled it down to his neck and coaxed him out of this emotional train.

When Oikawa was finally able to calm him down, he dragged him to bed and pulled him under the covers, turning off the lights while he was at it.

Under the covers, iwaizumi had latchted onto oikawa , wrapping not only his arms but legs around the larger one and nuzzling into his chest like a baby. Oikawa rubbed his back and whispered little nothings into his ear until he finally fell asleep.

But before drifting off to the world of dreams, Iwaizumi to say one more thing-

-And that was a quiet "I love you".