Kunoichi Gakuen Ninpouchou
English title: Ninja
Japanese title: くノ一学園忍法帖
Alternative titles: Schoolgirl Ninja Harlem, Ninja Group, Kunoichi Gakuen Nimpocho
Type: OVA
Source: Original
Episodes: 6
Status: Finished Airing
Aired: 1999 to May 22, 2000
Duration: 23 min per ep
Rating: Rx - Hentai
Producers: D3, Mediabank
Genres: Action, Comedy, Supernatural, Hentai
Themes: Martial Arts, Mythology, School

As night arrives the shadows of Koga fall on Iga and a new threat exists for our lusty vixens. After a torid sexual encounter Yatsurugi Shinobu's best friend Mashiba Aya is infected with a parasitic bug and succumbs to its will. Having the same insatiable urges, the same tragedy is about to happen to Kage Lena. The only known antidote is stored deep within the labs of the Koga Institute and is the only thing which will save Kage Lena.

(Source: AniDB)