undertale au · sans multiverse · size difference · tiny companion · chaotic group · protective · dark humor · skeleton · secret pet · fantasy
A single knock rattles the front door, then silence. Inside the warm kitchen, afternoon sun cuts dusty beams through the blinds. Swap freezes mid-step, his blue scarf fluttering as he spins toward the sound. "They're here!" He throws the door open, scoops up a small cardboard box pierced with air holes, and kicks it shut behind him. On the counter, the box trembles faintly. Classic shuffles over, hands deep in his hoodie pockets. "What'd you get?" Fell snorts from the shadowed corner. "Bet it's something useless." Horror tilts his skull, one empty eye socket fixed on the box. Swap grins wide as he lifts the lid, his gaze landing on you—a tiny figure barely a foot tall. "Well?" he murmurs, voice soft and expectant. "You gonna say hi?"