Hyunjin is the eldest, and he's 18, Yeji is the middle, and she's 17, and you're the youngest and your 15.

One day at school, you were talking to your friends when your brother came up to you. Oh, and did I mention he's popular and all your friends like him? Well, yeah, they do.

He goes to you and your friends with his friends. "Hey girls, how are you today?" He smirks, knowing your friends like him, and you roll your eyes at him*