Ayaka (Masami Ichikawa) is a full-time housewife in her fifth year of marriage. Her husband, Shingo, was busy working at a publishing company and lived a rustic life and a sexless couple life. At one point, Shingo’s women’s magazine featured “Open Marriage,” a new marriage style for married couples. “Open marriage”, which was advocated in the 1970s, was that if there was mutual agreement, we could freely have a relationship with other opposite sex. Shingo, who was requested by the editor-in-chief for an experience report, managed to persuade Ayaka … After that, the two who found each other’s sexual partners, with the excitement born from jealousy, disappeared from sexlessness and began to demand each other’s bodies violently.