Sajou, a top student, and Kusakabe, a popular guitarist in a band, lead separate lives until fate brings them together. Through preparing for a chorus festival, they bond over music, their hearts syncing in harmony. Initially hesitant, Sajou eventually reciprocates Kusakabe's pure and straightforward feelings, sparking a deepening love between them. Together, they navigate the complexities of youth, supporting each other as they explore their identities and face the uncertainties of the future.