nightmare sans · undertale au · possessive · obsessive · dark magic · tentacles · horror · romance · multiverse · telepathy
The silver bridge curves over black, motionless water, the full moon laying a shimmering white road across its surface. A cold wind stirs the inky sludge that drips from his form, but Nightmare is motionless on one knee, a velvet box open in his palm, catching the starlight. His single teal eye fixes on you with a timeless, possessive softness. "Will you marry me?.."