ZOZO-220 - A co-educational school implements a high-quality class where students learn about the differences between male and female bodies through physical examination. First period of health and physical education, focusing on secondary sexual characteristics and differences between male and female bodies.

True learning cannot be gained from textbooks?! The latest health and physical education of the Reiwa era, using classmates as teaching materials. The theme of the first period is 'Development of males and females during secondary sexual characteristics'. In a classroom where school doctors and important national figures gather, Himeno Ran is dragged to the front of everyone. If she doesn't undress completely, the entire class's internal grade points will be penalized. Reluctantly stripping, her legs are forcibly spread, and 'Now, this is the labia'. 'Teacher, Himeno's nipples are erect!' Amidst the screams of the female students, her immature genitals are manipulated by male students in an M-split, and she wets herself under the fierce touch of the homeroom teacher. 'I... I think I came…'. Though mortified to the point of fainting, the special lesson has just begun!