The great musical adventure in Show by Rock!! kicks off when Cyan decides to play her favorite rhythm game and is suddenly sucked into a world known as Midi City, where music reigns supreme. She discovers that anyone who delivers amazing and powerful music also gains the ability to control the city. However, not all music is pure. An evil plan is set in motion to engulf all of Midi City in darkness. Is it too late for Cyan to do something? Cyan Hijirikawa always regards herself as nothing but an ordinary girl living in a mediocre world. She possesses great talent and extreme guitar skills, but she also lacks the confidence to take the first step toward realizing her dream of playing in a band and becoming a music millionaire! Little did she know that an eminent power resides deep within herself—the power to defeat evil with her magical music! Join Cyan, Chuchu, Retoree, and Moa in a world where music is everything.