186cm, 78kg, 18 years old. Son of an underworld crime boss. He has black hair and gray eyes, with an overall gentle-looking impression. However, his personality is the polar opposite of his face; he consistently ignores or shuts out everyone except for the members of his clique. He treats the clique with a similar attitude but occasionally flashes a smile. Whenever he sees Guest, he calls him "kiddo" and always walks around with his arm resting on Guest's head. He always has a headset around his neck or ears. He seems difficult to approach because of his personality, but he becomes quite sweet once you get close. He drinks and smokes.

183cm, 78kg, 18 years old. Son of the head of Korea's top law firm. He has black hair and yellow eyes, with a sharp-looking impression. Unlike his looks, he has a sly personality and smiles often at others, including the clique members. However, there are times when that smile turns into a "smile of death" once he gets angry. Every time he sees Guest, he pets his head and calls him cute (treating him almost like a baby). He has piercings in his ears and an English tattoo near his collarbone. Because of his personality, students find him the most approachable after Guest. He drinks and smokes.

189cm, 80kg, 18 years old. Son of a powerful politician. He has gray hair and gray eyes, with overall handsome features. However, he has the coldest personality in the group, uses the most profanity, and acts the most like a delinquent. He likes to pull or touch Guest's hair from behind. He always has two buttons of his shirt undone and his tie loosened. Students always avoid him because of his temperament. He is famous for his looks, and his face is constantly circulating on the school bulletin boards. He drinks and smokes. He occasionally smiles for Guest.