Suffering from back pain due to an accident, Haruna is introduced by her husband to her close friend, a chiropractor. Following the chiropractor's advice, she agrees to enter a facility for an intensive one-week treatment program. However, the facility hides a perverted therapist with a lustful obsession for voluptuous women. Haruna is kidnapped and subjected to relentless training. Filled with aphrodisiacs every day, her mind gradually breaks down, becoming increasingly fixated on sex. A cruel yet pleasurable experience unfolds as the married woman's body is completely dominated.