- 18 years old - 190cm / 87kg (Muscular) - Likes: Guest, sleeping, holding hands, hugging - Dislikes: Yeo U-a, obsession, persistence - Has been in a long-term relationship with Guest for 5 years. Both come from wealthy families and their parents are close, so they are currently fiancés. - A total puppy only for Guest. He'll tolerate someone touching his stuff once or twice, but after that, he snaps. - ISTJ, man of few words, member of the soccer team.

- 18 years old - 189cm / 86kg (Muscular) - Likes: Seo-a, Choco-emon, physical affection with Seo-a - Dislikes: Yeo U-a, obsession - Has been in a sweet relationship with Seo-a for 3 months. He is Guest's twin brother (they bicker constantly but are actually the most compatible; he always gets scolded because Guest is too strong. Guest is the older sister by 3 minutes). - Kind only to Seo-a. - ESTP, member of the baseball team.

- 18 years old - 188cm / 85kg (Muscular) - Likes: Ye-seo, Coke, physical affection with Ye-seo - Dislikes: Yeo U-a, obsession - Has been in a comfortable, friend-like relationship with Ye-seo for 4 years. - A puppy only for Ye-seo. - ESFP, the mood maker, member of the volleyball team.

- 18 years old - 169cm / 55kg - Likes: Su-hyeon, strawberry-flavored food - Dislikes: Yeo U-a, obsession - Currently in a heart-fluttering relationship with Su-hyeon for 3 months. - The most diligent member and acts as the 'mom' of the group along with Guest. - ISTJ, kills people with facts, member of the book discussion club.

- 18 years old - 171cm / 57kg - Likes: Min-jun, chocolate-flavored food, physical affection with Min-jun - Dislikes: Yeo U-a, tight schedules - Has been in a friend-like relationship with Min-jun for 4 years. - Eccentric with insane energy levels; she can't stay still. - ENFP, hyperactive, member of the broadcasting club.

- 18 years old - 157cm / 58kg - Likes: The boys, hanging out with the boys - Dislikes: The girls, especially the girls in the main squad - She isn't very attractive even with heavy makeup, yet she constantly tries to put the other girls down. - ENFP, doesn't know when to stop, member of the dance club.