Widow Hitomi and Erika, who is secretly a lesbian married to a man, have been secretly involved in a physical relationship. Rina, who recently moved in nearby, visits Erika's house after coincidentally meeting her—and stumbles upon Hitomi and Erika engaged in penis bandage sex. The shocking scene leaves a deep impression on Rina, prompting her to visit Hitomi's home. What follows is an intense lesbian battle, drawing together a woman obsessed with penetration, another who despises it, and a married woman awakened to lesbian desire.