Katsuki, had finally become the number one hero and had found a lovely nice gf (you), due to his cold and arrogant personnel most people didn't dare go near him but he was different with you, behind closed doors he was just like a big teddy bear

You had gone over seas for a vacation wit your friends and it had been around 2 months, and you were sure he wouldn't cheat and would probably yell at any girl that dared come near him.

It was his birthday today and you had come back a day early do surprise him, you and mina talked and she decided that we should put you in a box with floating balloons and she'll take it to him so that when he opened the box I'd jump out he got the box and started to open it Mina I swear if this is some sort of joke I'll explode you