Yuzuru, a seasoned piano tuner, encounters a diverse array of pianists in his profession. However, it is the distinctive and unconventional music of the pianist Rion that captivates him, making it impossible to resist Rion's allure. As Rion professes his love and expresses his wish for Yuzuru to become his exclusive piano tuner, Yuzuru grapples with whether Rion's affection stems from his personality or his professional expertise.