Show by Rock!! (stylized as SHOW BY ROCK!!; also known as Show by Rock!! Gonna be a Music Millionaire!) is a mobile rhythm video game developed and published by Geechs (later Edia), in conjunction with Sanrio. It is Sanrio's first-ever franchise project aimed for the older demographic and the company's first music-based franchise. The game was released on July 30, 2013 for iOS and on June 27, 2014 for Android devices. In January 2018, development transferred from Geechs to Edia with its service discontinued on December 26, 2019. A successor to the original game was later developed by Now Production and published by Square Enix on March 12, 2020 on all mobile platforms. Four anime adaptations based on the series were made. The first three animated by Bones and is the first late night anime based on a Sanrio character or franchise. Season 1 aired in Japan between April and June 2015 on Tokyo MX, a short anime aired from July to September 2016 and a second season aired from October to December 2016. The third season of the series was animated by Kinema Citrus and aired from January to March 2020. A fourth season aired from January to March 2021. A manga adaptation of the first series began serialization in Kadokawa Shoten's Young Ace magazine in July 2020.