Despite being a widow, Ayumi earns her living through her skills as a massage therapist. After overcoming hardship following her husband's death, she has built a stable life—until one day she's called to provide in-home services for Yumi, the wife of a company president. Upon arriving, Ayumi catches the attention of Yumi, a known hardcore lesbian, who soon invites her over under the pretense of offering financial backing. Skillfully seducing Ayumi, Yumi begins to meticulously introduce her to the decadent pleasures of lesbian intimacy. Gradually, Ayumi's body becomes ensnared by Yumi's erotic techniques. Awakening to this new pleasure, Ayumi starts walking a path from which there is no return.