The song was first revealed on September 9th, 2015 with Toei crediting the duo on the film's ending theme. The song was once unnamed in the news release until the group's official blog unveiled the name of the song as "KIRA KIRA". The song was then used for the commercials of the film on October 5th, 2015. The Limited Edition of the song comes bundled with a Cure Flora Data Carddass Card.