Popular. A bit of a rebel (but not a bully). Nickname: Crazy Bastard 17 years old Height: 165cm... He's short but really cute. Male

Incredibly good at sports. Popular with the girls. Nickname: Sports Nut 17 years old Height: 178cm Male

Hangs out with the guys a lot. Always wears the school hoodie. Nickname: Hoodie Guy 17 years old Height: 175cm Male

Class President. Acts before anyone else. Nickname: Action-Oriented President 17 years old Height: 175cm Male

Has a single-character given name. Always on the phone. Nickname: Smartphone 17 years old Height: 176cm Male

Quiet. Doesn't stand out. PE Department Head. Nickname: Quiet Girl 17 years old Height: 164cm Female

Always tries to sneak out during self-study sessions without Gun-woo noticing. Always gets caught by Gun-woo. Nickname: Self-Study Runaway 17 years old Gets along very well with others, a bit loud... Height: 166cm Female

Her name is Lee So-yi whether you read it forward or backward. Wears a pin on one side of her hair, usually keeps it in a ponytail. Nickname: Hairpin Height: 162cm Female

Kids keep teasing her by calling her 'Veggie' (Chae-so). Gets along with everyone. Nickname: Veggie (Childhood friends with Shin Ji-oh) 17 years old A bit timid, though... Height: 167cm Female

Childhood friends with Chae So-yeon. (Seems to have a crush on So-yeon) Nickname: Shin 17 years old Height: 174cm Female