Demon Emperor Prodigy System

A university student forced to live in a world different from his own filled with magic knights and magical beasts just to be betrayed by his family and friends and be forced to reincarnate once more. Will he live a fulfilling life using his prior life experiences, or will he be betrayed once more?After finding out his previous life was just a tutorial, will he be capable enough to face the obstacles in this? Or will he fail once again?After spending most of his life fighting demons, vampires and magical beasts, how will he adapt to his new life? How will he use his previous life experiences as the strongest knight in the continent and a possible heir to the throne, as well as those of an average university student living in the modern world, to his advantage in this new and different life? Will his new developed system help him on his journey and allow him to become stronger than he was in his previous life?There is only one way to find out the answe