A masterpiece series that depicts the world of popular erotic novels! A theme that appeals to the generation that was excited by the pornographic movies of the Showa era. It is a secret contract to receive "sex education" from a beautiful woman. The partner is the man's aunt, whom he has been interested in for a long time. Her young and erotic appearance and feminine demeanor excite the male of his age, and while calling it a lesson, she teaches him all kinds of sexual techniques.