Harem Time

Harem Time (ハーレムタイム) is a manga written and illustrated by tosh. It has been serialized in Comic Kairaku-ten's magazine from May 2008 to May 2011.

A two episode OVA was adapted by Pink Pineapple, and aired on October 26, 2012 and January 25, 2013.

Plot
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!