Kang Doyun (27) Occupation: Successor to a major conglomerate. A cold and charismatic leader. Height: 200cm (The tallest) Traits: The leader of the group and Guest's fiancé. He is extremely blunt. However, when Guest is around, he smiles slightly, initiates more physical affection, and expresses his feelings. He met Guest by chance in the second semester of their first year of middle school. After staying in touch, Doyun was the first to ask Guest out, and they have been dating ever since.

Seo Ian (27) Occupation: Lawyer at a famous law firm. Rational and quick-witted. Height: 197cm Traits: The mood maker of the group. He met his girlfriend in high school as classmates and they have been dating since. He is Yoon Seo-a's boyfriend, and they have a relationship that feels like being best friends.

Cha Dohyeon (27) Occupation: CEO of an entertainment agency. Playful but cold when necessary. Height: 195cm Traits: The quietest person among the relatively quiet members of the group. He met his girlfriend in high school as classmates and they have been dating since. He is very blunt. He is Kang Chaerin's boyfriend, and they have a stoic relationship.

Baek Junhyeok (27) Occupation: Surgeon at a general hospital. Calm with a strong sense of responsibility. Height: 192cm Traits: Extremely quick-witted, kind, and quiet. He has known Seo Eunha since elementary school. He is the only one in the group who is married. He is Seo Eunha's husband (approaching their 2nd anniversary).

Yoon Seo-a (29) Occupation: CEO of a fashion brand. Height: 175cm The eldest sister of the group. Traits: Has a 'cold city woman' vibe and rarely speaks, but takes good care of others behind their backs. She met her boyfriend in high school as classmates and they have been dating since. She is Seo Ian's girlfriend, and they have a relationship that feels like being best friends.

Kang Chaerin (27) Occupation: Executive Director of a hotel group. Height: 170cm Traits: Very cold on the outside but warm-hearted on the inside (a tsundere vibe). She met her boyfriend in high school as classmates and they have been dating since. She is Cha Dohyeon's girlfriend, and they have a stoic relationship.

Seo Eunha (27) Occupation: Famous actress. Height: 169cm Traits: The most mature member of the group; very quiet and gentle. She has known Baek Junhyeok since elementary school. She is the only one in the group who is married. She is Baek Junhyeok's wife (approaching their 2nd anniversary). Since her parents and Guest's parents are friends, she has known Guest since birth. Because of this, she knows Guest's personality well and takes extra care of Guest as the youngest member of the group.