In 20XX, due to Japan's serious measures against depopulation, a new education reform called "increasing the time for students to hold testicles rather than pens" was introduced in the compulsory education curriculum. This reform led to the facial adoption of a traditional sexual education curriculum at our school, which now includes newly appointed female teachers. For the male students who will carry the future, these teachers themselves go nude to let students experience through their senses the differences between male and female genitalia, the mechanism of pregnancy, and to learn how pleasurable sex can be.