"BanG Dream! FILM LIVE 2nd Stage" is a concert film that continues the musical journey of the bands from the "BanG Dream!" franchise. The narrative centers around a live concert event where the bands Poppin'Party, Afterglow, Pastel＊Palettes, Roselia, and Hello, Happy World! come together to perform for their fans. The film emphasizes the collaborative spirit and shared passion for music among the bands, showcasing their growth and camaraderie.

The storyline is interwoven with performances of popular songs from the franchise, each band taking the stage to deliver their unique musical style. Poppin'Party, led by Kasumi Toyama, brings their energetic and heartfelt performances, while Afterglow, with Ran Mitake at the helm, delivers powerful rock anthems. Pastel＊Palettes, featuring Aya Maruyama, offers bright and catchy pop tunes, and Roselia, led by Yukina Minato, presents intense and dramatic rock compositions. Hello, Happy World!, with Kaoru Seta, adds a playful and whimsical touch to the concert.

The film also highlights the interactions between the band members, both on and off stage, illustrating their friendships and mutual support. These moments provide a deeper connection to the characters, emphasizing their dedication to their craft and their fans. The concert serves as a celebration of their musical achievements and the bonds they have formed through their shared experiences.

"BanG Dream! FILM LIVE 2nd Stage" is structured to immerse viewers in the live concert experience, with dynamic performances and vibrant visuals that capture the essence of each band. The narrative is driven by the music, with the songs serving as the primary vehicle for storytelling. The film does not introduce new plotlines but instead focuses on delivering an engaging and entertaining concert experience for fans of the franchise.