This Kyoto Animation film has the same setting as the Sound! Euphonium anime series. However, the focus here is on two other members of the music club, while the leads from the TV series hardly show up at all.
Ultimately it is a simple story, but told with a lot of nuance in the relationship between the two main girls and a lot of detail in the glorious animation. Speaking of animation, the parts recounting the fairy tale of “Liz and the Blue Bird” (the musical piece the band was rehearsing and a story the girls were fond of) had a whole different look, somewhat evoking the whimsical feel of a Studio Ghibli film.
I personally found the movie to be a little bit plodding, which was also my complaint about Sound! Euphonium. But at least here it’s dragged out to 90 minutes instead of 13 episodes. Additionally, Mizore and Nozomi are a more likeable pair than Kumiko and Reina. Therefore I was able to enjoy Liz and the Blue Bird regardless of the fact that I wasn’t crazy about the original series.