Attempting to fulfill a promise to his childhood sweetheart,
Keitaro Urashima is determined to enter Tokyo University. After being rejected twice, he decides to leave home and stay at his grandmother’s apartment complex to study. But when he arrives, his grandmother is gone and he finds himself under attack by the all-female residents. Will the girls accept him as their new apartment manager? Will his bones ever mend? More importantly, can he concentrate on his studies when he discovers that one of his tenants might be his long lost sweetheart?
Keitaro Urashima promised a girl when he was young that they would meet up again at Tokyo University in the future. Sadly, in the National Practice Exam, Keitaro ranked 27th from the bottom. Knowing his grandmother owned a hotel, Keitaro intended to stay there while continuing his studies for Tokyo U, only to find out the hotel had long been transformed into an all-girls dormitory. Through an odd twist of fate, Keitaro eventually became the manager of the dorm, beginning his life of living with 5 other girls.
Keitaro Urashima is somewhat of a failure. In order to fulfill a promise he made to a girl fifteen years ago, he has tried time and again to get into Tokyo U but has never managed to pass the exam. However, fate smiles upon him and he ends up working for his aunt, managing an all-girls dorm! Living with the feral Kaolla, the timid Shinobu, the sake-loving Mitsune, the blade mistress Motoko and the punch-happy Naru, can Keitaro keep his focus and keep his promise? And will he ever end up meeting that girl from his past?