Seijuuden: Twin Dolls
English name: Twin Dolls
Genres: Action, Supernatural, Hentai
Type: OVA, Episodes: 2
Aired: Jul 22, 1994 to Aug 26, 1994
Studio: Arms
Source: Original
Rating: Rx - Hentai
Synopsis:
Mai and Ai Amatsu are beautiful and powerful twin sisters descended from a Tennyo angel. However, part of this legacy includes fighting off sex-starved demons and protecting the child-like boy Onimaro from evil forces. Can Mai and Ai carry out their mission in life and retain their chastity at the same time? 

(Source: Animetric)