Keitarô Urashima is a 19-year-old boy who tries to study at the well known university of Todai. He tried three times and failed. He finally decides to go to the hotel of his aunt, the Hinata Hotel. When he got to the hotel, he found that it has been changed into a girls' hotel. The first time he met the people living in the hotel, they were not very happy to see him. Slowly, they began to accept him, even if he is clumsy and a pervert.