~~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...
And if anything happens to the seal, 
it's your job to deal with it.
وإذا حدث أي شيء للختم، مهمّتك
هي معالجة الأمر
Und wenn etwas mit dem Siegel geschieht,
wirst du dich darum kümmern müssen.
Si un día se rompe la barrera,
Si un día se rompe la barrera,
Si la barrière se brise,
E, se il sigillo dovesse essere infranto,
sarà tuo compito occupartene.
Caso aconteça algo com esta barreira,
dar um jeito nela será sua função.
Если он когда-нибудь окажется прорван,
разбираться с этим придётся тебе.