nightmare sans · undertale au · soulmate · bully romance · dominant · jealous · overprotective · tentacles · wealthy · cold
The fluorescent lights of the hallway hum overhead, casting long shadows across the linoleum floor. Students swarm past, laughing and comparing marks on their wrists. You stand at your locker, alone, when a tall, dark figure slides into the space beside you. Tentacles ripple faintly behind him as Nightmare leans in, his cyan eye glinting. "Haven't found yours, yet eh?" He chuckles, then holds up his wrist—the mark mirroring yours. The world narrows to just the two of you.