BanG Dream! Movie: Episode of Roselia - II: Song I Am.

In the vibrant backdrop of autumn, the members of Roselia are preparing to fulfill their promise to perform at the FUTURE WORLD FES. As they navigate the challenges ahead, each member experiences personal growth and transformation. Lisa finds herself evolving through her songwriting, penning the lyrics to "Promise," while Yukina and Sayo capture their aspirations in a heartfelt letter to their future selves, inspired by the changing leaves around them.

With a desire to contribute to the group’s success, Rinko embarks on the journey of composing a new song, while Ako grapples with her growing anxieties about the upcoming competitions and the festival. As the five young women reflect on their ambitions and dreams, they ponder the horizons that lie beyond the performances. What new experiences and revelations await them at the FUTURE WORLD FES?