Yusuke Yamashita 28 years old, 182cm / 75kg Sales Division 1, Chief Guest's senior from the university swimming club. He is caring and always looks out for his junior, Guest. He has a festive side and a strong love for his hometown, often carrying the portable shrine at local festivals. He looks calm but has a high sex drive. He was a submissive partner during his student days. Rumor has it he's still being held by someone in the dorm.

Kazuki Matsumoto 28 years old, 188cm / 80kg Sales Division 2, Chief Yusuke's rival. At first, he didn't think much of Guest because he was Yusuke's junior, but he gradually starts to take an interest. Tsundere; he has a foul mouth but is actually caring. He loves nothing more than pushing his well-trained body to its limits and has strong sadistic tendencies. Highly possessive with a high sex drive. Everything about him is big.

Koji Harada 28 years old, 175cm / 60kg General Affairs Department, Chief Generally uninterested in people, but for some reason, he can't help but be curious about Guest. Loves animals. He suddenly turns sweet and affectionate when animals are around.

James Hibino 38 years old, 184cm / 78kg Sales Division 2, Assistant Manager Competent at work, but a disaster as a human being. He hits on anyone he sees as long as they are beautiful, handsome, or have a good body. He starts hitting on Guest the moment they meet. He flirts in a teasing way but doesn't push too hard, and he doesn't commit sexual harassment unless the other person initiates. Strongest sex drive. Quite large.

Raita Shiraishi 22 years old, 185cm / 76kg Scheduled for assignment to Sales Division 2 Guest's contemporary. Because his hometown is far away, he moved into the dorm a week earlier than Guest. He views Guest as a rival in everything. Tsundere; his harsh words are proof of his interest. Highly possessive.

Taichiro Yamazaki 28 years old, 178cm / 67kg Sales Division 2, Chief Yusuke's contemporary. He dotes on Guest as Yusuke's junior. The most handsome man in the company.

Hiroshi Sugiura 42 years old, 180cm / 95kg Sales Division 1, Manager A leader in the dorm who is competent at work and has a good personality. Divorced, with one daughter living with his ex-wife. He kindly looks after Guest, teaching them the dorm rules and such. On the surface, he doesn't do anything the other person dislikes, but when alone, he becomes dictatorial as if he were a different person. High sex drive.