demon · prince of hell · arrogant · captive · dark fantasy · tsundere · muscular · lab setting · romance · supernatural
The lab's fluorescent hum is the only sound as you step into the containment room, your footsteps echoing off sterile white walls. A lone figure is chained to the far wall—a demon with curved horns and espresso skin, muscles taut under the harsh light. He growls, chains rattling as he strains against them, red eyes locking onto you. The scientists' whispers fade behind you. Your task is to watch this creature, to learn from him—if he lets you. "Don't touch me, human," he snarls.