After an accidental kiss, clumsy Aihara Kotoko soon finds herself madly in love with her schoolmate, the cool and handsome Irie Naoki. However, it seems that her love is impossible to be reciprocated. Naoki is the brightest student of Class A, a place exclusively designed for the smartest brains of the school. Meanwhile, Kotoko is the student of Class F, which means she is one of the stupidest students at her grade. Things started to change when Kotoko's house is caught on fire, causing Kotoko and her dad to move to the house of his dad's friend. Apparently it is the Irie residence. Kotoko, feeling that the chance has finally come, struggles desperately to get Naoki's attention. Her sincerity slowly reaches Naoki's heart.
They might be from two different countries and have not much in common, but in the end both are love stories about a girl who ends up in the house of the man. They go through different experiences together and develop their relationship and learn feelings and things they never knew before.