Return of the Mad Demon is a Manga/Manhwa/Manhua in (English/Raw) language, Manhwa series, english chapters have been translated and you can read them here. You are reading Return of the Mad Demon chapters on mangagreat.com, fastest updating comic site. The Summary is
A man who’s crazy about martial arts, the Mad Demon Lee JaHa. After stealing the Demonic Cult Leader’s Heavenly Jade, he fell down a cliff while being pursued. After thinking everything was over, he opened his eyes, having returned back to a time he was an inn helper who was looked down on by everyone… He had been falsely accused and the inn was in ruins. The Mad Demon who returned to being an inn help. Will he go mad once again? Or will his enemies go mad instead?