BanG Dream! Episode of Roselia I: Promise is an anime film that premiered in spring 2021, produced by SANZIGEN.

About the production: the story comes from a other, the film runs about 77 minutes and its current status is "finished".

Its main genres are music, with themes such as Primarily Female Cast, Primarily Teen Cast, Rock Music and Female Protagonist.

On AniList, BanG Dream! Episode of Roselia I: Promise has an average score of 76%, a very good score, and appears on 6,601 users' lists.

The franchise continues in or follows from: BanG Dream! Episode of Roselia II: Song I am..

“Are you prepared to fully devote yourselves to Roselia?” To reach the stage of “FES.“, Yukina Minato decides to form a band. Each holding their own convictions, the members of the band come together. The five girls now begin their journey to the top as Roselia... This is the story of their “promise” made to each other, from the start of the band to their challenge towards FUTURE WORLD FES! (Source: Bang Dream Official Site)

Official synopsis from AniList.