Violation of school rules is joint responsibility! A boy did this on purpose, and as punishment, both girls and boys went to school half-naked with their lower bodies exposed! The school rules that I attend are extremely strict.

The school I attend has a high rate of admission to famous universities, but the school rules are extremely strict, not even strict, but to the point where I thought it was from the Showa era, and if a student violates the rules, not only the student is punished, but the students in the same class are also jointly responsible. The punishment is an outrageous punishment of being naked from the waist down in the school building for a week, but what the teacher says is absolute, and whether it's a boy or a girl, students have no choice but to obey. Everyone manages to stay rational during class, but the rest of the time... In particular, boys have no sense of shame and end up showing off their dicks to girls. Girls don't like it at first, but gradually... The rules and penalties established for education end up driving students crazy!