ハレンチ学園 (Harenchi Gakuen Shameless School)

Argumento

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

Considered to be the first ecchi manga.

Consists of 3 parts, with the last left unfinished due to the cancellation. The final volume includes a 3 chapter backstory for Bearded Godzilla.