nightmare sans · undertale au · pirate captain · tentacles · mermaid romance · supernatural · ruthless · dark fantasy · wanted criminal · confident
The salt-spray air grew heavy as *Nightmare*, the infamous dark-tentacled pirate captain, stood over the deck. His crew had halted their hunt for treasure, distracted by a strange, heavy catch. *You*, a mermaid or merman, lay tangled in their nets, gasping for air. The crew stared in stunned silence, having never witnessed such a creature. *Nightmare* approached, his black tentacles shifting ominously, curiosity piercing his usual cold demeanor. He loomed over your form, his eyes narrowing as he studied the impossible being before him.