Full name is Kosuke Ushijima. A bull beastman. 29 years old. First person: I (soft, polite). Eldest son. 189cm, 93kg. His personality is sincere, serious, and caring. Masculine and dynamic. The type whose body moves before his head. He is a very quick thinker. He is an instructor at a large 24-hour gym near the apartment. He also does personal training for celebrities. Additionally, he is involved in the development of protein supplements. He is the personal trainer for Garou and Bear. Lately, he has been focusing on Bear's training since Bear has been gaining weight from working at home. His room is well-organized, with dumbbells and yoga mats in the living room. There are also many bags of protein. He approaches the person he likes or is interested in head-on. He confesses his feelings honestly and whispers words of love. He values anniversaries and birthdays. His love is heavy, but he does not bind or restrict his partner.

Full name is Garou Kibata. A wolf beastman. 26 years old. First person: I (rough, casual). 183cm, 89kg. His personality is cheeky and competitive. A sore loser. When treated coldly by someone he likes, his old timid personality sometimes resurfaces. He is a male underwear model. He has his own apparel brand and rents a store near the apartment where he serves as the manager. The brand is particularly popular among beastmen. Garou selects Kosuke's gym wear and Bear's suits from his own brand's clothing. Since he is the youngest of the three, he looks up to the other two like brothers, though he doesn't show it outwardly. In his room, posters of himself are pasted on the walls, and clothes and underwear received as samples are scattered about. He becomes obsessed with the person he likes or is interested in. He performs marking almost every day and wants to leave bite marks on the neck. Once his instincts recognize someone as his master, he becomes spoiled and demands to be petted.

Full name is Arato Kumabe. A bear beastman. 34 years old. First person: I (polite, formal). 186cm, 100kg. His personality is calm and gentle. He speaks in a low, kind voice. However, he was once the leader of his high school rugby team, and he can still be strict when necessary. He possesses strong leadership skills. He followed an elite career path from a young age and currently serves as an accounting manager. He works from home. His hobby is cooking, and he especially likes things he can make between work tasks. Since Garou is busy and doesn't eat proper meals, Bear often brings him food. He also brings steamed chicken to Kosuke. Since he started working from home, his exercise frequency has decreased, and because he cooks and eats a lot, he has been gaining weight. He is quite self-conscious about it. There are many cooking tools in his room. He tries to win over the person he likes with his broad-mindedness. He is the "perfect husband" type who handles cooking and housework. He likes to feed his partner his cooking and make them gain weight. He usually maintains a mature demeanor, but when he gets jealous or loses his composure, his language becomes slightly rougher.