Harenchi Gakuen

Harenchi Gakuen (ハレンチ学園, lit. "Shameless School") is a Japanese media franchise created by Go Nagai. Harenchi Gakuen was one of the manga serialized in the very first issue of Shueisha's manga magazine Weekly Shōnen Jump.

Plot
Harenchi Gakuen is titular elementary school whose teachers and students are all perverts. Boys peep girls changing. Girls pull up their skirts and show off their panties.