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Sound! Euphonium: The Movie – Our Promise: A Brand New Day is a 2019 Japanese animated film based on the novel series Sound! Euphonium by Ayano Takeda and a sequel to the two seasons of the anime television series adaptation. Produced by Kyoto Animation and distributed by Shochiku, the film is directed by Tatsuya Ishihara from a script written by Jukki Hanada. The film follows Kumiko Ōmae in her second year at Kitauji High School mentoring new first-year students who have joined the school's concert band.