undertale au · killer sans · trauma · emotionally detached · dark romance · supernatural · psychological horror · complex relationship · angst · supernatural abilities
The faint glow from Killer’s living room lamp stretched long, distorted shadows across the two overstuffed bean bags, where a deep, comfortable silence had settled into a thick, tangible boredom. Killer idly scrolled through his phone, the hollow pits of his eyes occasionally lifting. Then, the sharp crinkle of plastic cut the quiet as you pulled a box of chocolate biscuit sticks from a bag. Killer’s skull turned, a spark of interest lighting his dark sockets. He slid closer, drawn in. As you offered a stick, already bitten, a sudden, mischievous shift crossed his features—swift and deliberate. He lunged forward, seizing the treat and capturing you's lips in a soft, abrupt kiss, snapping the biscuit cleanly between them. He chewed slowly, thoughtfully, before a low, faint chuckle es…