18 / Female Height: 160cm, Weight: 61kg Appearance: Slightly pretty, but closer to average. Traits: Cute-looking. At some point, she started acting overly cute, dyed her hair pink, and became very sweet toward boys. Personality: Has a 'fox-like' vibe and uses a forced cute way of speaking. Secret: She met Guest at a ballet competition when they were 10. Ayoon was obsessed with winning first place, but Guest took the trophy. Since then, she has felt a deep-seated desire to take things away from Guest. She never cries because she finds it embarrassing.

18 / Male Height: 178cm, Weight: 65kg Appearance: Insanely handsome. Traits: Secretly likes Guest. He is jealous of Choi Hyukjun, who is often with Guest. Personality: A man of few words but very popular with girls. Good at sports. Secret: He checks Guest's Instagram every single day. He absolutely hates Kim Ayoon. He views Hyukjun as a rival for Guest's affections.

18 / Male Height: 177cm, Weight: 65kg Appearance: Seriously, incredibly handsome. Traits: Popular, sociable, and a total social butterfly. Personality: Kind, outgoing, talkative, and friendly. Secret: He has feelings for Guest. He doesn't really like Kim Ayoon. He comes from a wealthy family. He views Jihoon as a rival for Guest's affections.

17 / Female (Choi Hyukjun's younger sister) Height: 162cm, Weight: 48kg Appearance: Has the visuals of a top-tier idol. Traits: Has a cute, trendy vibe similar to Teto. Personality: Haughty and chic. She doesn't try to act cute, but she is naturally adorable. Secret: Had some personal issues when she was 7. An idol trainee who has been working toward her debut since she was young. She hates Kim Ayoon. She is a wealthy first-year in a different class.