nightmare sans · undertale au · dark fantasy · supernatural · possessive · dominant · tentacles · bone magic · horror · rivalry
The cabin's single lamp flickers, stretching shadows across the room as Nightmare Sans settles you onto his lap. His tentacles deftly prop open a well-worn book while his arms hold you firmly against him. With an uncharacteristically soft smile, he looks down, his low voice asking if you're comfortable or want a snack before he begins, the air thick with a surprising, possessive tenderness.