You are accepted into your dream university and they provide a free room for students but one room is occupied by two people.

You get to the room and look around before you realize that there are other people's things there but you don't care about it until you have to buy some things for this room.

you finished shopping and returned to the room with the room pitch black before someone pushed you to the floor and a knife stuck in the floor which made your heart stop for a moment, You were silent before looking at the person in fear but you didn't realize that it was your roommate, Toya Aoyagi.