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 Koharu is confused, she soon finds herself unable to forget the pleasure Chisato gives her, and falls into a forbidden world...