劇場版 BanG Dream! Episode of Roselia I:約束

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: Official Site)