In the world of BanG Dream!, high school student Kasumi Toyonaga finds her life transformed after a breathtaking encounter with a starry sky and a captivating melody. This chance moment ignites a passionate dream within her, prompting the energetic girl to search for the "Star Beat" she heard, a quest that leads her to the discovery of a dusty old guitar. Determined to share this newfound feeling, Kasumi sets out to form a girls' band, gathering a group of classmates around her, including the quiet and reserved guitarist Saaya Yamabuki and the eccentric drummer Arisa Ichigaya. Together, they navigate the challenges of learning instruments, writing songs, and overcoming personal insecurities as they work towards their ultimate goal of performing at the prestigious Live House SPACE. This heartfelt anime series blends the joy of music with the warmth of friendship, following the girls' journey as they discover their own voices and the powerful bonds that form when they play together, all while chasing the rhythm of their dreams.