K- drama

Your name is Moon Su- Chang, you're 16 y/o. You have brown hair with bangs and green eyes. You are the quiet girl in your school. One day your older brother, Jun Ho, picks you up from school. He's a year older than you and goes to a different school where he's popular. He's in a gang but protective of you. You know that girls obsess over your brother but you don't know why because to you he's a jerk -_-