It was first announced on the Dengeki G's Magazine website on February 26, 2015, with teaser images and character introductions in following issues. The project officially began on April 30, 2015 with the release of the character names and voice actress lineup.
The manga adaptation is titled "Love Live! School idol project Sunshine!!", illustrated by Oda Masaru. It began serialization in the May 2016 issue of Dengeki G's Magazine.