Yumi, a housewife living in Sano City, Tochigi Prefecture. Despite being 51 years old, she possesses a youthful beauty and once worked as a receptionist at her husband's workplace. On her way home from a lunch date with a friend, she was unexpectedly approached. Friendly and kind-hearted, Yumi is the type who can't say no when asked for help—caring and nurturing by nature. When asked to deflower a virgin, she gently agreed, saying, "Are you sure someone like me is okay...?" With her relationship with her husband having grown stale, she appeared thoroughly satisfied throughout the experience.