The Wildest Man on Earth

Mysterious Lucas hides his terrifying underworld identity “Shadow Demon” behind the disguise of a powerless F‑rank nobody. He enters a fake‑marriage contract with sharp‑willed heiress Celine Xavier. While fending off powerful enemies, greedy nobles and deadly assassins, he secretly protects her. As Celine gradually falls for him, Lucas also hunts for his missing sister Lucia, facing lethal threats from the sinister Heaven's Wrath organization.