Urotsukidoji: Legend of the Overfiend

"Urotsukidoji: Legend of the Overfiend" is a true classic of Japanese anime, not to mention the contribution this series made to the hentai genre. The work was released in 1987 and based on the manga by Toshio Maeda. At the turn of the century, the work became truly cult, as the abundance of violent scenes, dangerous battles, and hentai inserts were quite exotic for those times.

Hentai describes events of an alternative universe. The world is divided into three kingdoms: humans, beastmen, and demons. Our protagonist Amano is a half-breed, half beastman. Because of his behavior and excessive ardor, he was exiled to Earth to search for the Overfiend in human form, who, according to prophecy, is to unite the worlds.