I became the youngest prince in the novel Full Chapters                    

I became the youngest prince in the novel is a Manga/Manhwa/Manhua in (English/Raw) language, Action series, english chapters have been translated and you can read them here.

The Flosimar Chronicles of the Hero, a novel about the failure, not the success, of a warrior. “That sucks.” The emperor who had swallowed up the world closed his eyes and closed the book with a brief thought. But the moment I opened my eyes again, there were just a few lines in the chronicle. He had become a captive prince who faced death as soon as he appeared.