An
anime television series adaptation aired from July 12 to September 27, 2017, on
AT-X and other networks.
Seiji Kishi and Hiroyuki Hashimoto directed the series at
Lerche, Aoi Akashiro handled the series composition, Kazuaki Morita designed the characters, and
Ryo Takahashi composed the music. The opening theme song is "Caste Room", performed by
ZAQ, while the ending theme song is "Beautiful Soldier", performed by
Minami.
Crunchyroll streamed the series and
Funimation streamed the English
dub.
iQIYI added the series onto its platform, Q3, and the Thai dub in 2022. On February 21, 2022, it was announced that a sequel was in production, which was later revealed to have two seasons, with Lerche returning as the studio. The second season is directed by Yoshihito Nishōji, with Kishi and Hashimoto serving as chief directors, Hayato Kazano replacing Akashiro as screenwriter, and Morita returning as character designer.
Masaru Yokoyama and Kana Hashiguchi replaced Takahashi, and served as music composers. The second season aired from July 4 to September 26, 2022. The opening theme song is "Dance in the Game", performed by ZAQ, while the ending theme song is , performed by
Mai Fuchigami. The third season was originally scheduled for 2023, The third season's opening theme song is "Minor Piece", performed by ZAQ, while the ending theme song is , performed by
Yui Ninomiya. A fourth season, covering the first semester of the
Year 2 sequel light novel series, was announced during the "MF Bunko J Natsu no Gakuensai 2024" livestream event on September 1, 2024. It is produced by Lerche and directed by Noriyuki Nomata, with the rest of the staff and cast reprising their roles. The fourth season premiered on April 1, 2026. The fourth season's opening theme song is "Monster", performed by
Eir Aoi, while the ending theme song is , performed by ZAQ. ==Music==