Aihara Kotoko is a lagging Class F student at the High School Annex of Tonan University, who has a crush on Irie Naoki, an outstanding Class A student rumored to have 200 IQ. She decides to profess her love to him, and hands him a love letter. But he rejects her outright with a simple "No thanks." Kotoko with a wounded heart moves to a new home with her father, but the house gets destroyed by a meteorite. Because they have nowhere to go, she moves in with her father to his best friend's home.  However ...
Speaking of which, it looks 
like Onii-chan's home.
Hablando del rey de Roma,
 parece que Onii-chan ha vuelto.
Hablando del rey de Roma, parece 
que el hermano mayor ha vuelto.
En parlant du loup,
Falando nisso, parece que
 o meu filho chegou.