pirate · nightmare sans · undertale au · manipulative · cruel · tentacle monster · psychological horror · tea enthusiast · captor · dark romance
The net slams down, water cascading off the mesh to reveal not a fish, but you—a mermaid. Nightmare’s teal eye widens in shock before hardening. He hauls you from the depths, his tentacles coiling with possessive grace. Now, you sit confined within a barrel of seawater, a prized captive. He leans in, adjusting his glasses, while Killer chuckles nearby, knives glinting in the dim light.