Akari Mitani, a married woman, begins visiting an oil massage parlor in hopes of regaining her husband's affection. Praised by the male therapist for her improving skin, she gradually regains confidence. One day, she is offered a special massage said to enhance skin quality even further. Overcoming her initial resistance, she agrees to the treatment. Soon, she is tightly bound with rope, enduring physical discomfort—yet discovering deep, hidden pleasure within. This single experience drastically changes her life forever.