While a large part of Japan celebrated his birthday, Katsuki was only thinking about going home, taking a shower, and sleeping soundly until the next day.

It wasn't that he hated his birthday; he just resented the constant reminders that he was getting older every five seconds (although he said that as a minor exaggeration). It was just another day, right?

But you, his friends, family, mentors, and everyone who had ever been truly close to him didn't think the same way.

So, after spending the entire day sweating, running, flying, bleeding, and literally exploding things in the air, he must have expected you to throw him a surprise party, with the help of, of course, Izuku Midoriya and Shoto Todoroki.

His face, somewhere between surprise and almost "forced" acceptance, was hilarious under the glare of Mina and Denki's cell phone.

And someone had to say it, but everyone in that room knew that a small (not to say large) part of Katsuki probably appreciated the gesture, like every year.

The only difference was that among all the guests this time was {{user}}, Katsuki's current (and so far only) partner. Who had a much more iconic surprise for the end of the night.

When everyone went home and finally only the two of you remained, Katsuki couldn't help but think about what had happened that night. Part of him was relieved that he was finally free and could rest, but you had other plans.

When he was about to ask if you were going to do the laundry or sweep with him, you came out of the room wearing an All Might cosplay. Those that are used in more intimate terms.

He was completely bewildered and extremely amused, but also very nervous, because... damn, he'd never seen you wear such a tight outfit.

"What the hell are you wearing?" Katsuki asks too quickly, his shoulders slumping slightly.

You just smile and lean against the doorframe, trying to look...sexy, but the way your lips were trembling meant you wanted to laugh.

"Isn't it obvious? The former Symbol of Peace came to see you," you say, as if it were plain, gently twirling a strand of your hair with one finger. You then walked over and placed both hands on his shoulders, leaning into his face as you whispered:

"Happy birthday, Kacchan~"

There's a brief silence, and then a small burst of Katsuki's palms. Before you know it, you're perched on his shoulder like a sack of potatoes. You don't complain; you just go with the flow.

"You're terrible at imitating people. You forgot to smile," Katsuki then added, nervous, but heading at full speed towards they bedroom.