Mai, a caregiver, is dispatched to the elderly Yoshioka's home. When Mai comes to meet him, Yoshioka takes a liking to her cute appearance and makes an unreasonable request that she start caring for him immediately. Mai is confused, but Yoshioka, who has a strong sex drive, attacks her with his insidious sexual harassment. Mai is disgusted by the caregiver's job as the elderly man has corrupted her innocent body, but one day Yoshioka's health suddenly changes. Mai quickly performs life-saving measures and Yoshioka survives. This incident marks a major change in their relationship...