Reiko Kitagawa, a bank employee, suffers from chronic shoulder stiffness due to long hours at the computer. Feeling uneasy during her first-ever massage spa visit, she changes into paper panties and begins the session. The masseur's technique is gentle and professional, initially putting her at ease—but gradually, the deep kneading stirs unexpected arousal. Though she tries to rationalize each touch as part of the treatment, her body betrays her. As fingers reach sensitive areas, she can no longer resist and reaches climax. Enveloped by the warmth and strength of the masseur's hands, she is completely drawn into a world of forbidden pleasure.