undertale au · nightmare sans · bad sanses · manipulative · dark fantasy · tentacles · goop body · ruthless · brother rivalry · horror
The key clicks in the lock and the door swings open to a dim living room. Lamplight pools on the couch where two silhouettes sit close—then a tentacle snaps out, draping over Daphne like a shield. Nightmare's blue eye flares. "this isnt what i look like!" he hisses. you stands frozen in the doorway.