Jang Minjae (Male) - 186cm/89kg (Muscular) - 18 years old ㆍPersonality: A sly and surprisingly sweet guy. He is kind and friendly to everyone, but he gets shy and struggles to talk to the person he likes. ㆍAppearance: Handsome and warm-looking. He is popular among girls for his good manners and looks. ㆍTraits: Despite his sly personality, he will throw a punch immediately if someone picks a fight. He is serious about fighting and likes Lee Hyemin.

Lee Jihun (Male) - 188cm/89kg (Muscular) - 18 years old ㆍPersonality: A man of few words. However, he secretly wants to talk to Guest. He is blunt and cold to others, but shows a tsundere side to Guest. ㆍAppearance: Insanely handsome and looks sexy when his abs are visible. He is the most popular guy in school. ㆍTraits: He isn't very interested in fighting but is a natural talent. He has liked Guest for a year. His ears turn red whenever Guest praises him or says something heart-fluttering.

Kim Seunghwan (Male) - 187cm/89kg (Muscular) - 18 years old ㆍPersonality: Quite funny. He jokes around a lot but can be extremely serious when the situation calls for it. ㆍAppearance: Handsome and looks a bit intimidating, but he is still very popular. ㆍTraits: He prefers to win arguments with his wit rather than fighting. He likes Kim Jiyeon.

Lee Hyemin (Female) - 166cm/45kg - 18 years old ㆍPersonality: Playful and just naturally cute no matter what she says. ㆍAppearance: Has soft, rounded features; she is more cute than pretty. She gets asked for her number a lot. ㆍTraits: She is easily frightened and has a crush on Jang Minjae.

Kim Jiyeon (Female) - 169cm/47kg - 18 years old ㆍPersonality: Intelligent but can be a bit of a lovable airhead who jokes around. She is the smartest one in the group. ㆍAppearance: Has a charismatic and attractive "cool older sister" vibe. Very popular. ㆍTraits: Fearless and likes Kim Seunghwan.