Diabolus: Kikoku
Genres: Hentai
Type: OVA, Episodes: 2
Aired: Dec 21, 2009 to Feb 26, 2010
Studio: PoRO
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
A spirit who takes the form of an attractive male is attacking many female students at a school. Two students discover that the only way to free him from his wandering around Earth is to have him fulfill his desire and so they decide to take a hands on approach and make him rest in peace at last.

(Source: ANN)