Demon King, Stranded on an Island!

"The devil who lost its magical power in the fight against long angels fulfills the principle of absorbing the human soul and restoring its power! It was a demon king who traveled to the human world with a trusting four heavenly kings, but the destination that I reached was a solitary island of the ocean...! On that island where magic can not be used, a survival that can laugh backwards with the sadness of rulers and subordinates in the Makai begins!"