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Third-year student and guitarist Haruki Kitahara wants nothing more than his Light Music Club to play at his upcoming, final school festival. But soon, the other members quit, and Haruki resigns himself to playing one last solo jam session in the now-empty practice room. As he strums the chords of his favorite song "White Album", Setsuna, the school idol with an amazing voice, and Touma, an extraordinarily talented pianist, suddenly join the performance from an adjacent classroom and atop the roof, and Haruki becomes determined to keep the club going. Though one of the girls would rather avoid the spotlight and the other is a loner, Haruki’s passion wins them over and they agree to join. Now, with the performance date fast approaching, the trio spends all of their time together practicing, learning the joys of friendship, and the heartache that comes from falling in love with the same person...