Yuriko Koikeda, a widow who lost her husband a year ago, begins working at the Nogami household through a housekeeping service. But she is no ordinary maid—she is a mysterious woman engaged in the practice known as "sato-oka," a scheme where women target wealthy men who have lost their wives or divorced, seducing them with cunning words and marrying them to claim their inheritance. Her presence exerts a powerful allure on vulnerable men, and even the shy, inexperienced virgin son, untouched by women, finds himself drawn to her. As she slowly ensnares the hearts of the Nogami family, the story pulls viewers into her manipulative world of seduction, big tits, aggressive domination, rape, cherry boy deflowering, humiliation, and big ass temptation.