A virtuous housewife named Aya is suddenly forced to work at a rundown soapland after her husband, a factory worker, incurs a debt of eight million yen to his junior colleague. To settle the debt, her childhood friend and brothel owner Abe agrees to pay it off—but in exchange, Aya must become a sex worker. In front of her husband's eyes, she suffers deep humiliation as Abe, posing as a trainer, performs real intercourse on her under the guise of employee orientation. She is then forced to serve crude, vulgar customers. Through repeated encounters with various clients, Aya gradually hones her sexual skills, eventually becoming an exceptional soapland queen renowned for her mastery. But just as she reaches the peak of her craft, an unexpected customer walks through the door.