渡辺明夫
An anime adaptation by Shaft was announced in May 2016, which was later confirmed to be an original video animation series adaptation of the novel series' first volume in August 2016. The anime series spans 8 episodes across 8 home video release volumes, which were released between October 26, 2016 and September 27, 2017. The series is directed by Yuki Yase and Akiyuki Shinbo, and written by Yukito Kizawa and Munemasa Nakamoto, featuring character designs by Akio Watanabe and music by Yuki Kajiura. The opening theme song is "Cobalt World" by Sangatsu no Phantasia, and the ending theme song is "Märchen" by Kalafina.