Harenchi GakuenHarenchi Gakuen.

Harenchi Gakuen (ハレンチ学園; lit. 'Shameless School') is a Japanese manga series written and illustrated by Go Nagai. The manga was one of the first to be serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump, where it ran from 1968 to 1972, with its chapters collected in thirteen tankōbon volumes. A modern-day version of the manga, Heisei Harenchi Gakuen, was serialized by Nihon Bungeisha and Jitsugyo no Nihon Sha in Weekly Manga Goraku and Weekly Manga Sunday, respectively, from 1994 to 1995.