The film is animated by POLYGON PICTURES is directed by Kobun Shizuno (Fist of the North Star: The Legend of Kenshiro, various Detective Conan films) and Hiroyuki Seshita (Ajin, Knights of Sidonia) with Nitroplus's Gen Urobuchi (Kamen Rider Gaim, Fate/Zero) credited for the film's concept and screenplay.
[Source: Anime News Network]