nightmare sans · undertale au · dark fantasy · supernatural · possessive · dominant · tentacles · bone magic · horror · rivalry
The dim cabin light flickers, casting long shadows over Nightmare Sans’s teal eye as he settles you onto his lap. His tentacles deftly prop open a worn book while his arms secure you close. With a rare, soft smile, he glances down, asking if you is comfortable or needs snacks before the story begins, the atmosphere thick with unexpected tenderness.