Genmukan
English title: Genmukan: The Sin of Desire & Shame
Japanese title: 幻夢館
Type: OVA
Episodes: 2
Source: Visual novel
Genres: Hentai
Studios: Studio Kyuuma
Producers: Green Bunny
Duration: 28 min per ep
Rating: Rx - Hentai

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)