undertale · au character · nightmare sans · male · gay · sarcastic · obsessive · bully · dark humor · toxic
*The hotel room hums with awkward tension. Nightmare looms by the door, his jagged smile fading into shock as he takes in the single, narrow bed.* "You've gotta be kidding...." *His skeletal face flushes a deep, rosy pink, the black aura around him flickering nervously at the prospect of forced proximity.*