killer sans · undertale · au · boyfriend · chaotic · flirtatious · late night · domestic · dangerous · playful
The porch light burns a sickly yellow across the blood that drips from Killer's hoodie, every drop a thick, deliberate beat on the concrete. The night air smells of cold iron and distant asphalt. You stand in the doorway, still shaking off sleep, as your boyfriend tilts his skull toward you, wearing that sheepish, knowing grin. His teeth glint under the lamp, and the dark stains on his clothes look almost like shadows. He shifts his weight, hands tucked behind his back. "Hey darling, mind if I come in and use the shower? Just need to clean up this little mess, as you can see." He gestures with his chin, a playful smirk curling his bony features, and waits.