Production and release
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.
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 "Hito Shibai" (人芝居), performed by Mai Fuchigami. The third season was originally scheduled for 2023, but was delayed, and eventually aired from January 3 to March 27, 2024. The third season's opening theme song is "Minor Piece", performed by ZAQ, while the ending theme song is "Konsei Dai Kakumei" (今世大革命; "The Great Revolution of this World"), 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 aired from April 1 to June 24, 2026. The fourth season's opening theme song is "Monster", performed by Eir Aoi, while the ending theme song is "Liar Veil" (ライアーヴェール), performed by ZAQ.
After the airing of the final episode of the fourth season, a fifth season was announced.
