Young man Toshi, who has just moved in next door, suffers from extreme obsessive-compulsive disorder and insists on completing every task perfectly. Learning about Toshi's nature, Yuko—aware of her own husband's neurotic personality—worries that Toshi may eventually grow into the same kind of man. One day, Yuko visits Toshi's apartment and, while inspecting his meticulously organized room—including perfectly aligned remote controls—a cake she brought accidentally drops onto the floor. Witnessing the mess, Toshi screams in anguish. Right then, Yuko forces him to lick the whipped cream off her foot, beginning her mission to transform him from an orderly, fastidious man into a chaotic, primal male. The film delivers an intense, compelling progression as his personality unravels under her aggressive, seductive training.