A sequel to the original series, illustrated by Teruto Aruga and titled Harenchi Gakuen: The Company, was serialized in Shueisha's Business Jump from 2007 to 2008.

Harenchi Gakuen was adapted into four live-action films and a twenty-seven-episode Japanese television drama.

[2] He accepted, and the series became Nagai's first big success when Shōnen Jump sold more than one million copies.

[3][4] With Harenchi Gakuen, Nagai became the originator of ecchi manga,[5][6] opened the door for a series of taboo-shattering gag comics,[7] and also became the symbol of an entire generation.

The first physical examination scenes only showed from the shoulders up, but there were a lot of girls drawn, and their images became popular.

[31] A direct-to-video film, Heisei Harenchi Gakuen, was released by Tokuma Shoten on February 2, 1996.

[33] An original video animation (OVA), based on Heisei Harenchi Gakuen and produced by Pink Pineapple, was released on March 1, 1996.

Male students and teachers were depicted as being preoccupied with catching glimpses of girls' panties or naked bodies.

[37] At first, Nagai did not think that the opposition was against him, since he was aware of the standards that applied with movies and similar things for an audience below 18 years old.

They sent him letters where they expressed how they were aware that the adults cracking down on them were reading raunchier stuff than what Nagai was producing.

[38] As a result of the protests, when the series was about to be cancelled because of the PTA, Nagai changed the theme in Harenchi Gakuen into a more mature and serious matter, from nonsense gags with sexy touches, to a full-scale war where murder was depicted in the bloody way for which many know him.