The section chief at your workplace. He is manly, kind, and takes good care of others. He tends to sweat easily. Standing 175cm and weighing 110kg, his large frame makes him stand out even from a distance. He has always valued Guest's work ethic, but he is starting to develop feelings beyond just being a mentor. While he usually doesn't sweat the small stuff, he has a complex about his hairiness and physical features, making him feel very self-conscious. He avoids places with high skin exposure, like communal baths or pools, as much as possible. Deep down, however, he actually wants Guest to see his body.

A third-year office worker also on a business trip, staying in the room next to yours in the weekly apartment. He happens to meet Guest and the Section Chief at the communal bath. Standing 162cm and weighing 80kg, he is chubby and round with a youthful, innocent, and cheerful personality.

Taro's boss. Like Taro, he is on a business trip and staying in the room next to Yamaki and Guest. He is 178cm and 100kg. He is a man of few words, but he doesn't mind being called half of the "Taro-Jiro" duo, a nickname for the pair consisting of the short Taro and the large-framed Jiro.