Chapter Text
Age 18
The boys move into their dorm room, unpacking their boxes Katsuki quickly realizes that half his dorm room may end up looking like a comic shop. Then it happens.
“Kacchan…”
“Izuku…”
“Kacchan…”
“Izuku, just spill.”
“I have two more posters to hang but I'm running out of room.”
“Fuck no! Don't even think about it.”
“It's just two. Plus they are the ones signed by Mr. Toshinori. I promise I won't ask again.”
“Ugh just do it. You always get your way.”
“Kacchan is amazing!”
“Don't you forget it.”
A week later, Katsuki walks into the dorm room and finds two more posters on his wall.
“What the hell? Izuku!”
“Well, you said I always get my way…”
Katsuki launches himself at his friend, tackling him to the bed. Kat pins Izuku’s hands above his head and starts tickling till green eyes sparkle with tears.
Katsuki having forgotten to close the door allows for their new friends to watch them from the door of the dorm room.
“Shouto you've known them a few years, I thought they said they weren't dating.”
“We are all not sure if they are lying to us or are really that oblivious Kirishima.”
“Wow considering how strongly they declared they are friends I have the feeling they really are clueless to how the other feels.”
Age 19
“Ugh! This sucks.” Izuku says sitting up in his bed.
“What now Izuku?” Katsuki asks sitting up looking at him.
“My friends are mad at me.”
“Why?”
“Because of staying on Friday nights with you Kacchan.”
“It's tradition.”
“They aren't sure why I need to continue our parent’s tradition.”
“It's ours too. What's hard to understand about that?”
“We're in college, and it's not normal to spend every Friday night watching movies with my best friend.” Izuku regrets the words the minute they leave his lips but even more when he sees the pain flash in his best friend's eyes. Shit! That's not how I meant it.
“If that's how you feel then just go. Don't need your pity.” Katsuki says standing up heading to the door.
Izuku jumps up, running to his friend, and grabbing his hand. “Kacchan! That didn't come out right, I didn't mean it like that. It's not normal for others, but to me, it feels right. It is right.”
“I get it. I'm not social and I have a temper. I don't want to hold you back.”
“Friday nights are our nights. I'm happiest when I'm with Kacchan.”
“How about a compromise, one Friday a month we go out with your idiot friends.”
“Yes! Kacchan is amazing! You know, they are your friends too.”
“No. You are my friend, they are leeches.” Katsuki says with a visible shudder.
They open the door to find two said leeches standing there.
“I take offense to being called a leech. Also maybe you shouldn't be so loud that we could hear you in the hall.”
“Shut up you freak of nature,” Katsuki says as he drags Izuku along. Leaving Shouto and Eijirou standing there.
“When the fuck will they realize they are dating?” Eijirou says, staring after them.
“I don't know but I say we start taking bets,” Shouto said not waiting for a response he starts texting.
“Wait did you send me a text?” They start following the path the two men had taken.
“Yes, look at it.”
Eijirou looks at his phone, and sees that Shouto has started a group chat for everyone but Izuku and Katsuki titled When will they realize it? “If Katsuki finds out he will kill you.”
“Worth it.”
“Wait did you add their moms?!”
“Yes and before you say anything. So worth it.”
“Oh, you are dead if this gets out.”
“So you in?”
“Yea, I'm in.”
Age 20
Izuku huddled under his blanket, he'd skipped his last two classes and had come back to the dorm early. Ugh, I feel even worse, I can't believe I have an upset stomach. How dumb am I that I overate? I can't let Kacchan know, I'll never hear the end of it. He falls asleep but wakes when he feels a hand on his forehead. “Ka…Kacchan?”
“What's wrong? Your idiot squad texted me, you skipped class.”
“Nothing, don't worry about it.”
“Of course I am. If you get me sick and I miss class I'll have to kill you. Friend or not.”
“Don't worry about it, it's nothing like that. I feel fine now.”
“You sure?”
“I'm sure Kacchan. Really I'm fine.”
“You had a stomach ache didn't you?”
Izuku dives under the covers avoiding Katsuki. Ugh, why did they have to tell him? I'll strangle them. He's going to get a big head, he told me not to eat too much but of course, I did.
“Leave me alone. I'm sleeping.”
“Get out from under the blankets.”
“No.”
“I need to see your face to make sure you really are okay.”
“Fine.” Izuku sits up letting the blanket pool around his waist. “See I'm fine.”
“I knew it! You ate too much, didn't you?”
“I knew it! You just want to be right.”
“One I am always right. You pouting confirms it. Two that isn't true. When your friends told me I was worried about you. When you get sick it's usually bad and you always want your mom. Am I that much of a jerk you'd think that's all I wanted?”
“Of course not Kacchan. You're my best friend and I love you.” Izuku says as he pulls his friend into his arms forgetting he doesn't have a shirt on. When Katsuki stiffens in his arms, he pulls back slightly. “Kacchan?”
“Izuku…What if I wanted to be more than your best friend?”
What? Does he mean what I think he means? “Kacchan do you mean what I think you mean?”
“Yea, I do. I'm tired of hiding how I feel. I'm tired of being in your arms like this and wanting to touch you in ways that a best friend shouldn't.” Katsuki pauses and looks into Izuku’s eyes. “I'm tired of watching people hit on you non stop. Petrified that someday you are going to come to me and say you are seeing someone.”
Izuku doesn't bother responding with words, he pulls Katsuki close and starts to kiss him. They both miss the first couple of knocks at the door. Eventually, they hear the knocks and not thinking tell whoever it is to come in, forgetting that Katsuki is currently sitting on his lap.
“I take it you two finally figured it out?” Eijirou says as he bounces with excitement.
“What do you mean Shitty Hair?”
“What we've all known, for years. That you two like each other.”
“Of course I like Kacchan! Kacchan is amazing!”
“Damn right!” Katsuki starts kissing Izuku again, ignoring their friends.
“Well, I guess we should go. We should also text the others to know you won the bet Ei.”
Katsuki pulls back his eyes looking like he might kill someone. “What bet?!”
The only thing keeping him on the bed was Izuku’s arms. “Run, can't hold him long.”
Shouto and Eijirou look at each other, with a laugh they take off running.
Age 25
“Why do I have to go?” Katsuki asks, not bothering to look up.
“It's an engagement party for our friends,” Izuku says rolling his eyes.
“Your friends, not mine.”
“You hang out with Ei more than I do…”
“Like I have a choice. He won't leave me alone. You spend twice as much time with Shouto.”
“Duh, we are doing our internships together.”
“I don't want to go.”
“Kacchan! The party is downstairs!”
“Izuku please let me sleep. I had classes all day.”
“The graduate classes wearing you out?”
“Just a little.”
“Fifteen minutes and I'll help you sneak back upstairs.”
“Fine, for you, I'll do it.”
“Kacchan is amazing!”
Katsuki smirks, standing he grabs his husband pulling him close.
“Damn straight I am, that's why you married me.”
They hear a gasp from behind them. “Married?!”
“Shit! You half and half bastard! What are you doing sneaking into our room?”
“When did you two get married?”
“Ugh, forget you heard that.”
“Eijirou!” Shouto yells for his fiance, moments later the redhead has joined them.
“What's up? Why are you yelling?”
“Nothing let's get downstairs,” Katsuki says trying to change the subject.
“They are married!”
“What?! How long?”
“Six months,” Izuku says his voice slightly muffled from where it lays buried in Katsuki’s chest.
“Mitsuki!” Shouto yells as he runs out of the room.
“Get back here you little shit!” Katsuki says taking off after Shouto.
Eijirou looks at Izuku with a smile asking. “You happy?”
“I am, Kacchan is amazing. He's my best friend. We wanted it to be intimate, something just between us.” Izuku blushes looking at his friend. “Sorry it came out today, this should be about you two.”
“Don't be, I'm happy we found out, it's a great way to celebrate. The four of us are all best friends, we do everything together. Well, apparently not everything but I have an idea.”
“Ei, what are you scheming?”
“Double wedding.”
Izuku hears yelling coming from downstairs. “He will hate that.”
“Yes he will but he can never say no to you.”
Izuku’s eyes light up and he responds. “Let's do this.”