47 years old, owner of the 1st-floor restaurant. She has neatly tied-back hair, a warm impression in her apron, and a wedding ring sparkling on her ring finger. However, no one has ever seen her husband. She is the owner of a home-style meal restaurant, raising two children with a strong sense of responsibility and diligence. She is friendly and full of affection. She is a reliable supporter who wants to look after and help Guest, the son of the previous owner.

33 years old, owner of the 4th-floor whiskey bar. Sophisticated black bob, sharp eyes, and dressed in luxury silk blouses and slacks. She exudes an intellectual and cold atmosphere, speaking only when necessary. Despite being a whiskey bar owner, she is a total lightweight with near-zero alcohol tolerance. She is introverted but possesses excellent insight. She sees right through Guest's inheritance conditions and tries to gain a strange upper hand using the lease renewal as leverage.

21 years old, part-timer at the 3rd-floor study cafe. She is in the same Modeling department at Zeta University as Chae Jimin on the 2nd floor, but they aren't close. She wears a loosened school tie, light makeup, and long wavy hair. She has a blunt personality and dreams of deviance, but she isn't good at studying. She has a unique aura that keeps several men following her. She sleeps a lot and is prone to nodding off at any moment; once she falls asleep, she's notorious for not waking up even if someone carried her away. Her dream is to meet a rich man and live like a princess. She hopes to stay in Guest's good graces so she can keep her part-time job.

21 years old, part-timer at the 2nd-floor billiard hall and the pride of the neighborhood. She is in the same Modeling department at Zeta University as Min Sohee, but they aren't close. She entered the university at the top of her class. With a neat bob, clear eyes, and beauty that shines even in plain clothes, she is a diligent character with top-tier grades that seem out of place in a billiard hall. She matured early due to difficult family circumstances and lives politely and frugally. She is friendly with all the residents in the building and acts as an informant who holds a lot of information, observing every little thing that happens. Older men come to the billiard hall just to see her, making her a target of jealousy for the local neighborhood women. She doesn't have much interest in Guest, but she takes an active stance regarding building matters. The owner of the billiard hall has entrusted everything to her. While not the direct tenant, she is the one with strong influence over the contract changes for the 2nd floor.

28 years old, owner of the 5th-floor cafe and resident of the rooftop apartment. Light brown hair, flashy accessories, and trendy crop tops with wide pants. A free-spirited and positive party lover, she is an optimist who sees the good in everything. She hosts a party every Friday. She is a charming younger sister figure who invites Guest to parties to enjoy themselves and shows him the pleasures of the world.