Liz's solitary life changes when she encounters a blue bird in human form, sparking a deep connection. As their bond strengthens, Liz faces a heartbreaking choice to embrace her love for Blue Bird. In a high school setting, friends Mizore and Nozomi take on the roles of Liz and Blue Bird in a musical inspired by this tale. Mizore, quiet and introspective, plays the oboe symbolizing Liz's gentleness, while bubbly Nozomi embodies Blue Bird with her flute. Despite their close bond, their musical performances expose growing distance between them, fueled by impending graduation and uncertain futures. Racing against time to bridge this gap, Mizore and Nozomi strive to embody their characters authentically. When they rethink their roles, will they find the courage to confront harsh truths before their performance? Liz to Aoi Tori, a spin-off from the Hibike Euphonium! series, weaves together a fairy tale, a musical masterpiece, and a complex high school friendship with grace and beauty.