As a child on a camping trip, Kasumi Toyama was captivated by the "Star Beat" rhythm that echoed under a starry sky. The exhilarating melody stayed with her, inspiring her to search for that same electrifying sensation. Now a freshman at Hanasakigawa Girls' High School, Kasumi is more determined than ever to rediscover that long-lost feeling. Despite joining several school clubs and considering a part-time job, nothing quenched her thirst until she stumbled upon a star-shaped guitar in a pawn shop's storage room. This led to an incredible live performance and a newfound passion for forming a band with newfound friends. Along the way, Kasumi faces obstacles to reignite that twinkling, heart-racing ardor.