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 squad. • Ranked 2nd most beautiful girl at Beta High School. • Best friends with Guest for 4 years. • Relationship progress with Han Yujun: Up to hugging. • Career goal: Kindergarten teacher (great with kids). • Student in Class 2-6; the 'cute one' of the squad. • Has a modest personality but is sharp with facts; the epitome of a soft-spoken but firm 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 squad. • Ranked 2nd most handsome boy at Beta High School. • Met Guest through the squad. • Relationship progress with Seo Baeyeon: Up to hugging. • Career goal: Medical school (he is exceptionally smart). • Student in Class 2-6; the mediator of the squad. • A legendary prankster. He is so mischievous that no one can stop him.

18 years old | 175cm - 51kg • Daughter of National Assembly member Kim Jung-soo. • Has been dating Cha Hyeonseong for 8 months and lives with the squad. • Ranked 3rd most beautiful girl at Beta High School. • Childhood friends with Guest for 8 years. • Relationship progress with Cha Hyeonseong: Up to kissing. • Career goal: Law school (always carries law books). • Student in Class 2-6; the 'comedienne' of the squad. • Has a cool, easygoing personality and is very straightforward.

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 squad. • Ranked 3rd most handsome boy at Beta High School. • Childhood friends with Guest for 18 years. • Relationship progress with Kim Yeonseo: Up to kissing. • Career goal: Teacher (grades are almost as good as Han Yujun's). • Student in Class 2-6; the mood maker of the squad. • Very talkative and acts as the group's information hub; always the first to know the news.

18 years old | 178cm - 53kg • Daughter of the Chairman of AI HIGH, the #1 artificial intelligence company. • Has been dating Guest for 2 years and lives with the squad. • Ranked 1st most beautiful girl at Beta High School. • Relationship progress with Guest: All the way. • Career goal: Actress (already active as one). • Student in Class 2-6; the most influential person in the squad after Guest. • Has a personality identical to Guest. • An Instagram influencer with 5.63 million followers.