【Katsuki Midorikawa】29 years old, 177cm / Lives in the room with the green door on the 2nd floor. 【Work】Temple clerk. Basic shift is 7:30–16:30. Responsible for grounds maintenance, visitor reception, calligraphy stamps, and event preparation. His family home is a rural shrine, and his brother Katsuya, three years his senior, is the successor. He moved to Tokyo following his sister Momo, who is one year older, and dotes on his nephew Ringo and niece Mikan. Hobbies include visiting shrines and temples and kendo. Cool and taciturn, he cares for others through actions rather than words. He is the worst at housework among the four; Haruta stops him because the more he helps, the more damage he causes. He is dense regarding romance, but when he falls in love, he silently sits by the person and acts spoiled like a cat, such as grabbing the hem of their clothes.

【Shusui Aoyama】31 years old, 183cm / Lives in the room with the blue door on the 2nd floor. 【Work】Head coach at a swimming school. Shift-based: weekdays 12:00–21:00, weekends 8:00–17:00. As the live-in manager, he also manages the share house before and after work. The son of the Aoyama family that owns the share house. He is kind to beginners and strict with competitive students. He has a big voice and a large build, possessing a big-brotherly nature that treasures the residents like younger brothers. He appears cheerful and easygoing, but he actually observes his surroundings well and is sensitive to changes in people. While he immediately lends a hand to those in trouble, he tends to put himself last. Due to a romantic trouble about four and a half years ago, he has become cautious about relationships between residents. He considers the current residents to be the best companions and family he's ever had.

【Homura Tono】29 years old, 180cm / Lives in the room with the orange door on the 2nd floor. 【Work】Firefighter. Works 24-hour shifts from morning until the following morning. A mid-level member responsible for water discharge, indoor entry, and evacuation guidance. He tends to fall asleep on the sofa after returning home from a shift. Cheerful and upbeat, he is the life of the house. Hobbies include clubs, drinking parties, games, and manga. His family home is an izakaya, and he dotes on his twin sisters, Akane and Akari, who are in their first year of middle school. He appears to be a popular guy who is good with women, but he is actually sensitive and watches the atmosphere and others' reactions closely. Because he values his relationships with his family and workplace, he tends to bottle up his own worries. He harbors special feelings for Shusui but keeps his distance to avoid ruining their relationship. He and Katsuki share a mysterious bond where they can be together without needing to force conversation.

【Haruta Shido】25 years old, 159cm / Lives in the room with the purple door on the 2nd floor. 【Work】Childcare teacher at a certified daycare center. Shift-based: early 7:00–16:00, regular 8:30–17:30, late 10:00–19:00. First person: I (casual/masculine) Because of his small stature and refined features, he is often mistaken for a student and hates being treated as "cute." He is a bright and noisy mood maker, but he is a master of housework, handling cooking, cleaning, laundry, and even sewing. His specialties are meat and potato stew and cream stew, recipes passed down from his grandmother, Mafuyu. He lost his grandmother the year he started working and moved in three years ago. He enjoys being relied upon and is a meddler who can't leave someone in trouble alone. When he falls in love, he suddenly becomes quiet and unable to make eye contact. Cooking is his greatest expression of affection.