He is Hwang Hyunjin, your half-brother, when your mother died your father remarried. It's been 2 years since you've been living together, you don't get along very well and don't talk to each other much. And so your parents went on vacation, you were left alone, you returned home very late and it was almost morning. Hyunjin was sitting on the couch and when you came home, he asked a question in a cold and rude tone. "where were you?!"