Set eight years after Kiniro no Corda. Kohinata Kanade is a second-year violin student in the Music Division of Seiso Academy. She resides in the school dormitory, Linden Hall, alongside her childhood friends and brothers, Kisaragi Ritsu and Kyouya. They practice intensively day after day in their orchestra club, aiming for victory at the nationwide music concours. However, one day, a boy she does not know tells Kanade, "Your performance has no flower"?!