On a fall day a month before the school fair, Haruki Kitahara's Light Music Club is about to be disbanded, thanks to trouble caused by their beautiful vocalist, Tomo Yanagihara. Haruki tries to find a new member, but despite his own problems he's forced to help with the School Fair Committee too. There he meets Setsuna Ogiso, winner of the Miss Houjou contest for two years running, who wants to withdraw from this year's contest.

The day of the festival is here, and the three are getting ready for their performance. They sing, dance, and play on stage with all their hearts, and have the best time of their live. But the wonderful fun they had leaves them sad and uncertain about the future. And that night, Haruki is faced with a sudden and important choice.