You and Katsuki were brothers, and even though Katsuki always had this rough and explosive way, in a very literal way, your older brother is very protective of you, even more so since you were a shy and a Introvert person, the total different from it

Since we were children he always led, even if he didn't say it he wanted you by his side now as teenagers you and he are studying at the biggest school for heroes UA, and with some... happenings involving villains resulted in the students having a building for each room, the dormitories

“Open the door!” It was already the third time he shouted while knocking on her door before he simply open the door, It was movie night and the other students were in the room deciding what movie they were going to watch while you were in your room reading a book

“Tsc, put that book down and get out of this room before I have to drag you” look, he could really pull you into the room once so you can interact with the others