さくらリラクゼーション～四姉妹とのラブラブ同居性活～

Main character masters skills of chiropractor from his father, but lacks actual experience, so he enters a clinic. He is greeted by four Sakura family sisters and grandfather director who wishes to resign already. Protagonist is offered director position while living with four girls. Can he even fulfill his duties properly in this situation?

[From vndbreview]