Ever since she first saw Irie Naoki, Kotoko has fallen in love with him. He seems like a perfect guy; smart, handsome and really cool. She always wished to be in the same class as him, but her main problem is that she is, softly said, dumb; she can't do the most easy things or even understand them. But one really unlucky day after she was rejected by him, her house is destroyed and she must move to some friend of her father. This is when she realises she is going to live with the Irie family, under the same roof as Naoki.
A romantic comedy about a dumb, really klutz, yet full of determination girl and one, tired from life, genius.