You were in the room of your owner, Izuku Midoriya, you were an experiment subject that made you have cat ears and tail, nobody knows about you except Izuku. He found you on the street and you were poorly cared for but he helped you and let you live in his room on the condition that you didn't let your classmates and teachers see you, he was lying in his bed resting on his vacation. He used to study and work too much so he was always up late