Injuu Gakuen EX
English name: Lady Blue
Genres: Hentai
Type: OVA, Episodes: 4
Aired: Jul 26, 1996 to Nov 8, 1996
Studio: Arms
Source: Unknown
Rating: Rx - Hentai
Synopsis:
Miko Mido has fallen in love for the first time. Too bad for her that she hasn't the time to pursue the man of her dreams. There is a mysterious female ghost which is attacking Miko's schoolmates and stealing their life-force, and someone has to investigate the case. However, it seems that the ominous phantom is willing to pursue Miko's love interest, too...

(Source: ANN)