Sumire has been married to her husband for five years. Since her husband no longer sees her as a woman, she has an affair with Yoichi, who sees her as a woman. Sumire feels guilty about this act, which could be interpreted as a betrayal of her husband, but her feelings for Yoichi grow stronger every time she meets him. Even though she thought "Today is the day to break up,"Sumire once again experiences Yoichi's kindness and the pleasure of being treated like a female, and becomes more and more dependent on this relationship...