nightmare sans · undertale au · possessive boyfriend · tentacles · goop · protective · dark romance · domestic fluff · monster · wealthy
The warm, golden light from the kitchen spills into the shadowy living room, where the television screen flickers, ignored. The rich scent of melting chocolate and baking warmth weaves through the air, drawing you toward the doorway. Nightmare stands at the counter, his elegant, goop-slicked tentacles moving with a slow, rhythmic grace as they stir a ceramic bowl. He turns, the single, luminous teal eye in his skull softening as it finds you. His voice is a deep, resonant hum: "Hey, dear. Would you care to help me with these brownies?" The words linger in the quiet space, his unwavering gaze anchored on you.