COLORFUL STAGE! The Movie: A Miku Who Can't Sing

Set in modern day Shibuya, Project Sekai Movie: Kowareta Sekai to Utaenai Miku centers on Ichika Hoshino, a high school girl and street musician who encounters an unknown version of Hatsune Miku after hearing a Miku song that she'd never heard before in a CD store. Ichika learns that this version of Miku is having trouble reaching people with her songs, so together they team up to try to touch the hearts of their audience through music. Source Crunchyroll