My Demon My King

I am a noble child, more precisely the son of a king in a kingdom named Fujutsu, I am the first son of a king named Kaseki, my father once asked a hermit to predict my destiny when I grew up again and unexpectedly, the hermit was shocked when he predicted myself when I was still in my mother's womb and unexpectedly the hermit did not believe what would happen to me one day I grew up and here my story begins.