Keitaro discovers a doll that can move on its own. Everyone is amazed by it but Keitaro seems to be able to hear it talk also. He finds out from the doll that his great grandfather promised to fix its legs but never did and being the good guy he is, Keitaro decides to fulfill his ancestor's promise.. With the help of the girls, of course!
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.