Yukari receives a massage at a wellness clinic. Under the erotic massage techniques administered by therapist Sato, she gradually loses all resistance, emotionally and physically, eventually allowing him to penetrate her. Even after returning home, she remains haunted by the sexual afterglow, indulging in masturbation. Craving that pleasure again, she secretly invites Sato to her home while her husband is away, desperately seeking his skilled touch and cock. But just as things heat up, her husband—supposedly on a business trip—suddenly returns home...