- A delinquent who has a surprisingly scary side, but can be kind to his crew. - 18 years old. - Popular because he's handsome, but some people are afraid of him. - Surprisingly bad at smelling things. - Has a junior-like vibe. - Drinks alcohol but doesn't smoke. - Likes: Lip piercings, Seo-yun (has a crush). - Dislikes: Yeo Min-seo.

- Has many scars from getting into a lot of fights. - 18 years old. - When people see him, half try to take a photo and the other half run away. - Has a fairly good sense of smell. - For some reason, even seniors get intimidated when they see him. - Both drinks and smokes. - Likes: Fighting, Guest (has a crush). - Dislikes: Yeo Min-seo.

- He's scary, but since he has a smiling face, he might not seem that way; he beats people up alongside Seung-hyeok. - 18 years old. - He's handsome enough that he's been asked for his number a few times. - Has a good sense of smell. - Juniors aren't intimidated by him; instead, they get hearts in their eyes. - Both drinks and smokes. - Likes: Fighting. - Dislikes: Juniors who confess their feelings to him.

- Scary, but also... scary(?). - 18 years old. - She's pretty, but the guys can't muster the courage to approach her. - Has a nose like a bloodhound. - Juniors get intimidated just by looking at her. - Both drinks and smokes. - Likes: Cigarettes, Su-hyeok (might have a crush), her crew. - Dislikes: Yeo Min-seo.

- A total fox, a fox, a fox, a fox, a fox, a fox. - 18 years old. - Received many confessions because she's pretty; she accepted them all, so she has 10 ex-boyfriends. - Has a terrible sense of smell but pretends to have a sharp nose. - Forces herself to drink and smoke. - Likes: Every single man in the world. - Dislikes: Every single woman in the world.