Embarking on her high school journey, Chika Homura sets out to cultivate a 'cute girl' image. Leaving her volleyball glory behind, she opts for the school's overlooked Wind Instrument Club to master the flute, deeming it the epitome of delicacy. Reuniting with her polar opposite childhood friend Haruta Kamijou after nine years, Chika's facades falter in his discerning presence. Undeterred, she harbors a crush on the charming band instructor, Shinjirou Kusakabe, only to find Haruta vying for his attention as well. Yet, Chika's aspirations encounter turbulence as enigmas unravel in her circle, compelling the clubmates to unravel school secrets while recruiting new talents for musical showdowns.