It is an official song for the Anime Next 100 project to celebrate Japanese animation’s 100th anniversary, performed by 23 anison artists/groups.
The Anime Next 100 project was launched in November 2016.
The idea of the anniversary song was brought by Kohei Tanaka, who is best known for his soundtrack works for Sakura Wars and One Piece, with a concept to create an anison version of “We Are The World.”