He is a joke to the demon clan, and even more so to the demon clan's royal family.
In this place where the strong are respected, he was born without magic power and was weak like a member of the demon clan. The royal family was ashamed of him, but the demon king paid special attention to him and seemed to want to make him the crown prince. So his situation became even more difficult.
He's had enough of all the cold looks.
He had had enough of bloody fighting.
Finally one day, he saw his future in his dream.
It was a future so powerful that everyone trembled and knelt down, but in the end they were stabbed to death by the so-called righteous protagonist.
But before he becomes strong, he will encounter changes that will wipe out his family and be unable to protect the one he loves (sister).
So he made up his mind to change that future and start by becoming stronger.
[Second person in the text]
Intention: Facing desire