In Japan, there is a serious problem with the birth rate, so the IKUMONOGAKARI law was passed, which made sexual relations mandatory for everyone.
In the first chapter, students at one school are taught practical lessons about sexual life. In the first lesson, they learn everything about ejaculation, oral sex, and intercourse.
In the second chapter, students are told that they should put into practice what they have learned over these months. As a result, the boys organize an orgy sex with their classmates.
