Return of the Mad Demon (en) follows Lee Jihwan, a brutal demonic swordsman who is betrayed and killed by his own sect. He reincarnates as a young noble in a peaceful world, vowing to live a quiet, lazy life. However, his violent nature and overwhelming martial arts talent constantly drag him into conflict. Readers enjoy the story for its dark humor, the protagonist’s unhinged and chaotic personality, and the satisfying action as he effortlessly overwhelms enemies while pretending to be a harmless commoner.