~~The following program contains adult themes and scenes of violence and sexual assault that may not be suitable for some viewers and is inappropriate for children. The content is intended for mature audiences only.~~

Centuries ago, vicious and bloodthirsty demons who were immune to all manner of weaponry plagued mankind. Humanity's cries for help brought forth the Idaten; battle deities who would use their incredible speed to hunt the demons down, and then seal them away. In the following 800 years of peace, the Idaten have not had any enemies to fight. But that is about to change...
Wait, humans die from falls, right?
لحظة، البشر يموتون من السقوط، صحيح؟
Ach, Menschen sterben ja,
wenn sie aus dieser Höhe fallen.
¿Los humanos mueren al caer?
¿Los humanos mueren al caer?
Oups, les humains meurent pas
en tombant ?
Ora che ci penso, gli umani
muoiono per gli schianti, vero?
É mesmo. Se humanos
caírem, eles morrem, né?
Ах да, люди же могут разбиться насмерть?