Injuu Gakuen La☆Blue Girl: Fukkatsu-hen
English title: La Blue Girl Returns
Japanese title: 淫獣学園 La☆Blue Girl 復活篇
Type: OVA
Source: Manga
Episodes: 4
Status: Finished Airing
Aired: May 25, 2001 to May 25, 2002
Duration: 29 min per ep
Rating: Rx - Hentai
Studios: Arms
Producers: Green Bunny
Licensors: Critical Mass Video, Kitty Media
Genres: Hentai
Themes: Mythology

A race of butterfly-demons named the Mahoroba want to enslave Miko Mido and her sister to steal them the seal case that control the Shikima. Their ultimate goal is to conquer the Shikima Brain, a legendary place of the Shikima realm which is said to confer the power to rule the universe. 

(Source: ANN)