True learning can't be obtained from textbooks! The latest in Reiwa-era health and physical education, using a beautiful classmate as a teaching material. The theme of the first class is "The development of male and female secondary sexual characteristics."Ran Himeno is dragged out in front of everyone in the classroom, including the school doctor and national leaders. If she doesn't get completely naked, the whole class will lose marks in their school report. After tearfully stripping off, her legs are forced open, and it's revealed to her that, "Listen, guys, here are the labia majora." Teacher, Himeno's nipples are erect! As the female students scream, the boys play with their immature pussies while they are spread-legged, and the teacher's fierce fingering finally makes them wet themselves. "Did I come...?" Even though they are so embarrassed that they feel like they might pass out, the special lesson has only just begun!