The game inspired a stage play that debuted at The Galaxy Theatre in Tokyo last July, and also ran in Kyoto before ending its run at The Galaxy Theatre last November.
The A3! game debuted for smartphones in January 2017, reaching two million downloads within a month of its debut.
The app also ranked #2 in iOS game sales in Japan two times on January 9 and January 10, 2018.
Mariko Komatsu is adapting the original character designs by Ryō Fujiwara and serving as chief animation director.