Koharu, who moved when her husband was transferred, is a brave young wife who puts up with her husband who is often absent. Her neighbor, Chisato, a housewife, is also kind to her. However, her true target is Koharu's body. Chisato relentlessly plays with Koharu's body, and although she is confused, Koharu realizes that she cannot forget the pleasure Chisato gives her, and falls into a forbidden world...