The widow Hitomi and Erika, who is secretly married to a lesbian. The two have had a physical relationship. Rina, who recently moved in, heads to Erika's house but witnesses Hitomi and Erika having penile vagina sex. Unable to forget the scene from that day, Rina goes to Hitomi's home and gets penetrated by her penis vagina. The battle of the married lesbian women begins—one woman obsessed with penetration, one who hates it, and one who has just awakened to lesbianism.
