[1][2] The anime is produced by Madhouse and directed by Manabu Ono, along with original character designs by Kana Ishida and soundtrack music by Taku Iwasaki.
[3] The series ran on Tokyo MX, GTV, and GYT in Japan from April 6 to September 28, 2014 with later airings on MBS, CTC, tvk, TV Saitama, TV Aichi, TVQ, TVh, AT-X, BS11.
[7] At the "Dengeki Bunko Aki no Namahōsō Festival" event on October 6, 2019, a second season of the anime series was announced and originally scheduled to air in July 2020, which will adapt the "Visitor Arc" in the novel series,[8] but it aired from October 4 to December 27, 2020 due to the COVID-19 pandemic.
[13] It was later revealed to be a 60-minute episode, with the main cast and staff of the second season reprising their roles.
[16][17] In July 2023, the sequel was confirmed to be a new television series directed by Jimmy Stone at Eight Bit.