Three years into their marriage, the Kobayashi couple's relationship had grown cold. Then, an abnormal erotic drama begins to unfold. It starts with a seemingly casual remark from their neighbor, Kaoru. Acting friendly, he slips a drug into Mio's drink, undresses her, and takes humiliating photos—a despicable act. Shaken by the incident, Mio cannot bring herself to tell her husband and suffers in silence. Meanwhile, Kaoru grows increasingly aroused by his escalating perverted games. Treating her unusually large breasts like toys, he plunges Mio into deep pleasure. This shocking turn of events completely distorts their relationship.