ハーレムタイム THE ANIMATION

Satou Reiji's life changed when the genealogy was actually discovered. He is the son of a rich man who died recently, and now Reiji is the new ruler of Kamiyama's house. But there is a problem for Reiji. In order for him to be accepted into the house by law, he must provide an heir, and to do so, he must choose a wife from his own harem!