~~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...
Immediate death following destructive 
organ trauma is a trait of organisms.
الموت الفوريّ عقب صدمة عضو حيويّ مُدمّر
هو من سمات الكائنات الحيّة
Der Tod infolge von verletzten Organen
ist typisch für Lebewesen.
Mueren si les aplastas el corazón.
Mueren si les aplastas el corazón.
C’est une particularité
des êtres vivants
Una morte immediata dopo un trauma agli organi vitali
è una caratteristica degli esseri viventi.
Morte imediata devido a
trauma destrutivo nos órgãos.
Быстрая смерть после разрушения важных
органов — особенность живых существ.