Ever since she entered high school, Kotoko Aihara wanted to be in the same class as Naoki Irie. The only problem, Irie is the smartest student in school while Kotoko is one of the dumbest. Now in 3rd year high school, she still isn't there. One day, her home gets destroyed and the only place else to go was to Irie's home. Now that she lives close to him, will their relationship be the same, or will it become greater than it is.
Keitaro Urashima is determined to be accepted into Tokyo University, the hardest Japanese University of all to get into, because of a promise he made to a girl when he was young... a girl whose name he can't even remember. After failing to get into Tokyo U twice, he is kicked out by his parents and goes to live with his Grandmother at her hotel, but it seems it has been turned into an all girls boarding house. What's more, much to his surprise and to the tenants disgust, Keitaro is made manager of the boarding house.