Injuu Kyoushi
English title: Angel Of Darkness
Japanese title: 淫獣教師
Type: OVA
Source: Unknown
Episodes: 4
Status: Finished Airing
Aired: Oct 21, 1994 to Nov 22, 1995
Duration: 43 min per ep
Rating: Rx - Hentai
Studios: Horannabi
Producers: Pink Pineapple
Licensors: SoftCel Pictures
Genres: Horror, Supernatural, Hentai
Themes: Mythology

Atsuko and Sayaka think they have it made when they are both accepted into the same prestigious women`s academy. There, they will be free to explore the intense passion of their relationship, unbounded. 

But when the mystical bonds imprisoning a hideous ancient evil that feeds on the lust of nubile women are accidentally broken, the two young lovers soon learn they have more to fear than final exams.