The northwest world is a synthesis of real cases, and the southeast world is a popularization of sexual science. If you are interested, I will show you the way. The official source is ahaschool software course sex education.
The last one is sex education, and the first four chapters are a kind of future.
Purpose: Understand the knowledge of self-protection, popularize sex education as an education of love, gender and respect, education of ethics and law, understand the dangers of premature sex, understand the body structure, establish good interpersonal relationships, love life, understand basic contraceptive methods, understand menstruation and spermatorrhea