Hitomi, a widow, and Erika, who is secretly married to a lesbian. The two had a physical relationship. Rina, who has just moved in, heads to the house of Erika, who she recently became acquainted with, but she witnesses Hitomi and Erika having strap-on sex. Rina, who cannot forget the sight of that day, goes to her home in Hitomi, where she is penetrated by her strap-on. A married woman lesbian battle begins between a woman who is trapped in insertion, a woman who hates insertion, and a woman who has awakened to lesbian.
