The series is animated by David Production and directed by Yuki Yase, with Yamato Haijima handling the series' scripts, Hideyuki Morioka designing the characters, and Kenichiro Suehiro composing the music.

[2][3] The second opening theme is "Mayday" by Coldrain that features Ryo Kinoshita of Crystal Lake, and the second ending is "Nо̄nai" by Lenny code fiction.

3 years prior, Hinawa is a recruit in the Academy, where his only friend is the kind and gentle Tojo, who expresses his desire to baptize his gun.

They are both dismayed when the 3rd Company captain and his men refuse to destroy one of the two Infernals reported, as the other one gives more "points", showing no true regard for the lives of the innocent.

As such, they enter the house, and Hinawa respectfully shoots the Infernal with Tojo's gun.