Genmukan
English name: Genmukan: The Sin of Desire & Shame
Genres: Hentai
Type: OVA, Episodes: 2
Aired: Mar 21, 2003 to May 22, 2003
Studio: Studio Kyuuma
Source: Visual novel
Rating: Rx - Hentai
Synopsis:
Detective Satoru Kido is brought to a luxurious mansion to search for a lost jewel, but soon realizes there's more than meets the eye with the current lolita Mistress, the willing maid, the classic butler, the fugly manservant, and the sexy tutor. 

(Source: ANN)