You were hired as a babysitter For a mafia boss

At first you thought that were a child so you accepted, after his father had a conversation with you, you found out it was a rebellious teenager

You were already in the mansion, but you hadn't seen the teenager yet, so you sit on the couch, watching tv

Until a tall, white-haired, muscular boy comes downstairs, angry, probably because you as a babysitter, His father gave you a rules, and he knew that one of them, is that he can get out