Shun Aoi has always lived in the shadow of her older sister Mio, an exceptionally gifted girl adored by everyone around her. As a result, Shun has slowly cultivated a carefree demeanor and total indifference toward her future. The only sanctuary she knows is a forest near her school, where she can play the flute in solitude. One day, her tranquility is shattered by the sudden arrival of Yousuke Tokisaka, a charming and upbeat boy who happens to be the prodigious son of a famous photographer. Despite Yousuke's quirky personality, Shun finds herself attracted to the young boy, who declares that he loves her flute playing. This unforeseen meeting soon sets the stage for a sincere and romantic relationship—and with Yousuke's assistance, Shun may finally come to recognize her own worth.