After a series of seductive encounters, Tanaka accidentally becomes too rough during his monthly rent-payment intimacy with his landlady, Miyuri. Overcome with guilt, Tanaka sincerely apologizes, prompting Miyuri to turn the experience into a "private lesson" on female anatomy and the importance of partner care. While the two find a more harmonious and satisfying rhythm together, Miyuri ensures that these extra educational services come with an additional charge to his rent.