Mai, a caretaker is sent to an old man, Yoshioka. Yoshioka liked her cute appearance and told her to start taking care of her health that same day. Unfazed, Yoshioka secretly sexually harassed her with strong sexual desire attacks. The old man had eaten away at his innocent body, and he did not like his job as a nurse, but at one point Yoshioka's physical condition suddenly changed. Mai immediately took life-saving measures, and Yoshioka saved her life. And the relationship between the two changes drastically with this opportunity.
