Kai's duty as a member of the Human Protection Agency is to ensure that the four races from The Great War are kept sealed in their graveyards. Humanity has been at peace for 100 years, until one day a portal opens and the world he's known ceases to exist.
The demons, 
wielders of mighty magical powers.
عِرق الشّياطين، مالِكو القِوى السّحريّة العظمى
Die Dämonen, die über immense
dämonische Mächte verfügen.
Demonios: portadores
de grandes poderes mágicos.
Demonios: portadores
de grandes poderes mágicos.
Les démons
et leurs magies puissantes.
Demoni.
Detentori di poteri magici terribili.
Os demônios, detentores de
enormes poderes mágicos.
Демоны, обладающие великой силой чар.