My Mage System (BL)

[He had been the best assassin of all time in his world and when he was finally killed, a goddess took the opportunity to send his soul into the body of a boy in another world who was weak for now but who was destined to become the most powerful mage of this world., This young boy was called Kevin and he decided to take his identity as he had kept his memories., The only thing he had in common with him was that they were both orphans, but Kevin had a weak mind and a weak body, in short, everything he hated the most., After successfully entering the Sun Sect as a mage, he managed to open the book Kevin had inherited from his parents and which he had been unable to open., What was his surprise when he realized that this book had turned into a System that allowed him to level up like in the virtual reality games he used to play in his home world., With the help of this System he will fufill his wish, he will become the most powerful humans of this world, not even shapeshifters or demons will be able to do anything to him.…………, Kevin turned his head towards him and seeing that he was still naked he said, looking away again : \