[Depth + substance + satisfying progression + no brainless decisions] The war between humans and demons ends in the demons’ defeat. Su Yu, son of the Demon God, is left stranded in the human world. Wang Xicheng, dean of the Royal Academy of Magic, implants him with entirely new memories, hoping to turn him into a machine for slaughtering demons. Through one heart-pounding trial after another, Su Yu gradually recovers his lost memories and ultimately draws the Abyssal King Sword, uncovering the secret behind the war between humans and demons.