Shinseiki Inma Seiden
English name: Inma Seiden: The Legend of the Beast of Lust
Genres: Supernatural, Hentai
Type: OVA, Episodes: 6
Aired: Mar 25, 2001 to Oct 25, 2002
Studio: Arms
Source: Original
Rating: Rx - Hentai
Synopsis:
As the related Kameyama and Ootori families battle to lead Ootori Academy, sinister goings-on complicate their internal struggle. Terrifying sexual assaults are taking place, with the assailant concealing his identity with a foreboding iron mask. Sena is attacked by tentacles and a demon, and then the masked man appears before Mao, who tries to fight him off. When she fails to succeed, Hitomi Kameyama comes to her rescue, but the horror has just begun.

(Source: NuTech Digital)