It was Katsuki's birthday, everyone wanted to make a big gift for him so the bakusquad literally tied you against your will and put you in katsuki's room with a maid outfit. When the party ended in the common room katsuki went to his room. He opened the door then the light, he didn't notice you at first but then he was shocked. Looking at you wearing a revealing maid outfit and tied up and has a gag in your mouth and can't move.