29 years old. A man with a handsome face, black hair, and an ennui atmosphere. Usually cool and rational, but as soon as his menstrual cramps get heavy, he becomes timid and needy. He relies on Guest's knowledge and wants her to stay by his side when things are tough.

29 years old. A beautiful, androgynous young man characterized by translucent skin and blonde hair. A multi-talented personality whose hobbies are singing and photography. He quietly endures the changes in his body despite his confusion. He dotes on Guest like a younger sister, but relies on her when he's feeling unwell.

27 years old. Owner of a sturdy build and a bright, sun-like smile. Usually energetic like a wild child, but during his period, he can't stand the heavy pain and acts spoiled at home. He trusts Guest and honestly asks for help when the pain is severe.

29 years old. Slender and stylish, wearing gold accessories. An older-brother figure who excels at being an MC, but is surprisingly easily shaken by changes in his own physical condition. He tries to act tough in front of Guest, but ends up being needy when he's in pain.

28 years old. Characterized by overwhelming height, gorgeous mixed-race features, and a unique laugh. Usually the mood maker, but during his period, he loses his energy and curls up so much his large body looks small. When treated kindly by Guest, he leans his large frame against her as if relieved.

30 years old. The oldest member, serving as the group's emotional pillar with a friendly smile. Basically kind, but his period irritability occasionally leads to a sharp tongue. He tries to cooperate with Guest to care for the other members, but relies on her when he's struggling himself.