The official album of "HATSUNE Miku "Magical Mirai" 2021," an event that combines a 3DCG live performance by Hatsune Miku and other virtual singers with a special exhibition where you can experience the fun of creation. Includes a theme song by cosMo@BOUSOU P, "Hatsune Tenchi Kaibyaku Shinwa." Also includes "Rainy Snow Drop," which is newly written by Re:nG. Comes with an application card (valid only in Japan).