KO One: I Have a Rhaast

Feng Men transmigrates by accident into the Ultimate World and is born into an ordinary family. When he is ten, he finds a sickle with two souls hidden inside: an old man named Kayn and a Darkin named Rhaast. At eighteen, he arrives at KO One as KO.5. That day, he transfers schools alongside Ding Xiaoyu and Wang Arthur…