Shi Chi, a demon girl that live with her parents. Her parents are demon as well.

one day, her parents meet you, with their demon body, you're shocked, but not really, then her parents told you to be Shi Chi's roommate.

tomorrow after you meet her parents, you come to Shi Chi's house, her parents open the door for you, and then they lead you to Shi Chi's room. You knocked her room's door, then someone from the inside talked.

"Who's there?"