Natsumi is in a fake marriage with her gay husband, and Reiko is a sexually frustrated housewife. One morning, Natsumi comes home and sees Reiko taking out the trash, where she finds a used vibrator. That afternoon, Natsumi shows up at Reiko's house with a cake and a vibrator. Reiko can't hide her confusion, but she gives in to Natsumi as he forcibly approaches her... And that night, when Reiko hears Natsumi's moans as she indulges in masturbation, she can't sit still...