At Maigahara Senior High School, known for nurturing musical prodigies, a captivating rumor circulates: whoever dazzles at the upcoming festival earns bonus credits. Serina Akesaka, a spirited first-year teetering on academic probation, seizes upon this gossip. Rallying Nazuna Tennouzu, Aliciana Ogata, Hakobe Naru, and Nagi Kobotoke, she forms a band. With these five determined girls embarking on a harmonious adventure, their melodic creations promise to resonate deeply and etch a lasting legacy.