Yuka's husband, Hiroki, quits his job to search for a new path in life and consults his former boss, Tsuchiya. This visit sparks Tsuchiya's strong interest in Yuka, and he gradually begins pursuing her. Wanting to keep it a secret from her husband, Yuka deepens her relationship with Tsuchiya. Forbidden romance and sexual encounters she can't share with her husband drive her into deeper longing. The wild, intense sex with Tsuchiya—so different from her experiences with her husband—shakes Yuka to her core.