~~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...
These events occurred over 800 years ago.
وقعت هذه الأحداث منذ أكثر من 800 عام
Das fand nun vor
über 800 Jahren statt.
De eso hace ya más de 800 años.
De eso hace ya más de 800 años.
Ces événements se déroulèrent
il y a 800 ans.
Questi fatti risalgono a oltre 800 anni fa.
Esse evento aconteceu
há mais de 800 anos.
Эти события произошли восемьсот лет назад.