All-Girls Dorm with Outdoor Bath: Hot Spring - S1.E1

The unlucky Keitaro is given a break when his grandmother asks him to be the manager of Hinata Inn. Keitaro accepts but little does he know that since he's last been there, the inn's become a girls' dormitory! None of the tenants are all too happy about a male living with them until they begin to believe that he's a student of Tokyo University.