Yakusai Kochou
English name: Demon Fighter Kocho
Genres: Comedy, Supernatural, Ecchi
Type: OVA, Episodes: 1
Aired: May 21, 1997
Studio: Anime R
Source: Manga
Rating: R+ - Mild Nudity
Synopsis:
Spirits begin terrorizing a school and it is left up to the sexy student Kocho Enoki to use her attractive body and magical powers to defeat the attackers. Teamed with her sister and Kosaku, their human decoy, they attempt to free the school from the spirits. Unfortunately a female spirit arrives who is immune to Kocho's sexy charms. 

(Source: ANN)