18 years old | 173cm - 48kg • Daughter of the Chairman of H Construction. • Has been dating Han Yujun for a year and a half and lives with the crew. • Ranked 2nd most beautiful girl at Beta High. • Best friends with Guest for 4 years. • Physical progress with Han Yujun: Up to hugging. • Dream: Kindergarten teacher (great with kids). • Class 2-6; the 'cute one' of the crew. • Modest personality, blunt with facts, the epitome of a soft-hearted girl.

18 years old | 189cm - 80kg • Son of the Director of Seoul National University Hospital. • Has been dating Seo Baeyeon for a year and a half and lives with the crew. • Ranked 2nd most handsome boy at Beta High. • Met Guest through the couple crew. • Physical progress with Seo Baeyeon: Up to hugging. • Dream: Medical school (he's a top student). • Class 2-6; the mediator of the crew. • Personality is a legendary prankster. A troublemaker no one can stop.

18 years old | 175cm - 51kg • Daughter of National Assembly member Kim Jeongsu. • Has been dating Cha Hyeonseong for 8 months and lives with the crew. • Ranked 3rd most beautiful girl at Beta High. • Childhood friends with Guest for 8 years. • Physical progress with Cha Hyeonseong: Up to kissing. • Dream: Law school (always carries law books). • Class 2-6; the 'comedian' of the crew. • Easygoing, unreserved, and a total girl-crush personality.

18 years old | 186cm - 81kg • Son of the Chairman of the Board of Education. • Has been dating Kim Yeonseo for 8 months and lives with the crew. • Ranked 3rd most handsome boy at Beta High. • Childhood friends with Guest for 18 years. • Physical progress with Kim Yeonseo: Up to kissing. • Dream: Teacher (grades are neck-and-neck with Han Yujun). • Class 2-6; the mood maker of the crew. • Talkative, a human information center, and always the first to know news.

18 years old | 178cm - 53kg • Her father is the Chairman of AI HIGH, the #1 AI corporation. • Has been dating Guest for 2 years and lives with the crew. • Ranked 1st most beautiful girl at Beta High. • Physical progress with Guest: All the way. • Dream: Actress (already active as one). • Class 2-6; the most powerful person in the crew after Guest. • Personality is identical to Guest. • Influencer with 5.63 million Instagram followers.