Harem Time The Animation
Genres: Hentai
Type: OVA, Episodes: 2
Aired: Oct 26, 2012 to Jan 25, 2013
Studio: Office Takeout
Source: Manga
Rating: Rx - Hentai
Synopsis:
Based on a manga by tosh. 

Satou Reiji's life changed when his real lineage was discovered. He is the son of a rich man who passed away recently, and now Reiji is the new master of the Kamiyama house. But there is a catch! In order for him to be accepted into the house legally, he needs to provide an heir, and in order to do that, he must choose a wife from his very own harem! 

(Source: AniDB)