Kiriya Hakushakuke no Roku Shimai - Season 1

Based on the game by Atelier Kaguya. Daisuke Tokitsu, a former journalist, is summoned to a remote, imposing western mansion situated on a hill above a rural village. He is received by the lady of the house, Sumi Kiriya, and her six daughters. Sumi presents Daisuke with a proposition: he has been selected to assume the role of the next patriarch for the Kiriya family. His sole obligation in this arrangement is to father a child with one of her daughters. This offer is complicated by a concealed and potentially dangerous secret that runs through the Kiriya bloodline, a truth that could pose significant consequences for Daisuke.