Legend of the Overfiend" is one of the classics of Hentai genre. It represents the beginning of an epic story, that will stir anime-fans’ blood. Additionally, Urotsukidoji was created by Toshio Maeda, one of the pioneers of "animated tentacle sex". Also, Urotsukidoji was more violent than anything that you could see in the anime genre back then. There’s a lot of blood, exploding bodies, guts flying around, as well as physical and psychological violence and of course sex.