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 "elite student in music room 2" turns out to be Haruki's delinquent classmate, Kazusa Touma. With his characteristic pushiness, he tries to get her to join the light music club. But his pushiness backfires, and only makes her more annoyed. Setsuna gets irritated... no, involved, and approaches Kazusa secretly.

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.

Ever since the school trip, Kazusa hasn't come to school. Haruki tells himself that it's because she's practicing for the upcoming recital, but part of him is still struggling over what's happened. And even when he's with Setsuna that doesn't go away. He finally invites Ogiso to a birthday party, with just the two of them, to finally come to terms with his feelings. But he doesn't know that Kazusa is making a big decisions of her own...