On a long-awaited hot spring trip, the husband suddenly falls ill and collapses into bed, leaving his wife no choice but to stay beside him. Just then, a massage therapist unexpectedly appears and offers a treatment. Unaware that the therapist has sexual intentions, she opts for relaxation over discomfort and begins the session. Nearly naked, wrapped only in a bath towel, she starts receiving an oil massage right next to her sleeping husband. The oil contains a hidden aphrodisiac, gradually arousing her. Despite her husband lying right beside her, the massage turns into sensual caressing—and before she knows it, he penetrates her. Overwhelmed by the thrill of possibly getting caught at any moment, she ultimately ends up receiving a creampie.