A revenge-consumed man achieves his deadly goal and faces execution, only to awaken in a dark nightmare realm. Reincarnated as a monster in a fantasy world of magic beasts and kingdoms, he's bound by eternal contracts and enslaved as a battle beast companion. Trapped among scheming aristocrats and warring nobles, he endures gore-filled strategic battles and relentless servitude. With only his will and cunning as weapons, he must grow from weakness to strength. Navigating conspiracies and political intrigue, he fights for survival and freedom from the chains of his tragic, monstrous existence.