Kasumi Toyama recalls hearing the "Star Beat" when camping as a child while admiring the starry night sky. This dazzling, heart-pounding sound left an indelible effect on her, and she has been on a never-ending quest to regain that thrilling excitement. Kasumi is more determined than ever to reclaim that long-lost experience as a new student at Hanasakigawa Girls' High School. She tries out for a variety of school clubs and even considers working part-time, but none of them feel right for her. That is, until she comes across a star-shaped guitar in an old pawn shop's storage area. It leads her to a live house, where she is enthralled by a live performance.