Yuka is a single mother who has raised her son. She usually dresses in revealing clothes to confuse men, but it's not just her clothes that are excessive; her sexual desires are also excessive. To calm the heat in her body, she invites her boss over to her house in the middle of the day and enjoys secret affairs. Meanwhile, her neighbor Shirakawa, who knows about this, approaches Yuka... She forgets about her son Yoichi and takes him to her room in the joy of being desired by a younger man. However, Yoichi happens to witness it...