Heavenly Demon's Grandchild

An anonymous assassin who was used as a blade for the Orthodox factions. After the successful subjugation of the Heavenly Demon Cult, he was discarded like a worn-out shoe. And when he opened his eyes, he had regressed to twenty years before the death of the Heavenly Demon. He was born as the grandson of the Heavenly Demon—a figure who never existed in the original history. "Oh my, my grandson! Let me see your face!" Now, he will protect them.