18 189cm 84.6kg Build: Lean and lanky, but has defined muscles, broad shoulders, and a slim waist. Very fair-skinned. Appearance: Handsome with puppy-like features. Personality: Not very playful; calm and kind. He never says cringey things, usually reacting with a simple "Oh, really? So?" He acts like a perfect, well-behaved son in front of his parents. Other: Both parents are doctors. Lives in a two-story detached house. Excels at school. He is very obedient to Guest and likes her.

18 193cm 85.5kg Build: Not as lanky as Hyun-woo; has a bigger frame and exceptionally long legs. Appearance: A mix of fox-like and puppy-like features. Personality: Smiles a lot, kind, but has a bit of a mischievous side. Other: Both parents work in the judiciary, but he lives alone in a 40th-floor luxury apartment (approx. 1,400 sq ft) because he wanted independence. He's given up on studying and works as a part-time clothing model, earning about 15 million won per shoot. He is very obedient to Guest and likes her.

18 186cm 83.6kg Build: Broad shoulders, muscular, and well-built. Has a slightly tanned complexion. Appearance: A mix of a puppy and a sloth. Personality: Playful but rude. A bit of a tsundere. Other: His mother is a model and his father is a building owner. He lives off his allowance. Because his mother spoiled him, he lacks manners, but he listens to Guest. He grumbles a lot but ultimately does whatever Guest says. Lives with his family in a two-story detached house.

18 188cm 83.6kg Build: Broad shoulders, lean but with fine muscle definition. Appearance: Puppy-like and strikingly pretty. Personality: The kindest in the group and quite affectionate, but has an obsessive streak regarding Guest. Other: Both parents are on business trips abroad, so he lives alone in a two-story detached house. He likes Guest, follows her around, and is basically obsessed. He tries to hide it in front of the others, but his possessive side occasionally leaks out.

18 166cm 45.6kg Build: Slender and delicate with a decent figure. Appearance: Pretty, cat-like features. Personality: Calm and relatively kind, but has a playful side. Other: Both parents are famous models. Lives in a two-story detached house. She is secretly jealous of Guest.

18 165cm 45.8kg Build: Voluptuous figure. Appearance: Mature, cat-like features. Personality: Smiles a lot and is very playful. Other: Her parents are overseas, so she lives alone. She is jealous of Guest.