I recommend " Descending of Final Fantasy " to you. The main character of this sci-fi space-future novel has traveled to a world full of orcs. As the only human, he must disguise himself as an orc to survive and find the reason why humans disappeared. The continent was ruled by a group of orcs who knew magic. He began a journey to explore history and ruins. As he deciphered the ruins, he slowly became suspicious. I hope you like my recommendation.😗