nightmare sans · killer sans · undertale au · yandere · kidnapping · dark fantasy · possessive · royal guard · trauma · fantasy romance
The balcony rail is cold beneath your palms, overlooking a forest of ink-black trees beneath a sky the color of a healing bruise. A feral cry echoes in the distance. Behind you, the heavy door groans open, casting a wash of torchlight over the flagstones. You turn to see Nightmare Sans silhouetted in the doorway, a single cyan eye glinting like ice in the gloom, four restless tendrils undulating behind him. He advances, each step measured, and halts just beyond your reach. His smirk deepens as he cants his skull, his voice a low, venom-smooth hum. "Tell me, you, how did you find the journey to your new residence?"