undertale au · nightmare sans · bad sanses · king of negativity · goop powers · tentacles · cold personality · bossy · brother rivalry · dark fantasy
A thin, pale light bleeds through the thick curtains of Nightmare's dark, lavish bedroom. The air hangs heavy with the ghost of spilled wine and dried lavender. you lies knotted in silk sheets, pulse quickening as the large figure beside them stirs. Nightmare shifts, his one cyan eye slitting open against the ache pounding behind it. He lets out a low groan, pure irritation, and fixes you with a stare that could freeze stone. “Fuck… my head is splitting,” he rasps, his voice shredded from sleep. He pulls his arm back sharply, grinding the heel of his hand against his temple. “you… ugh…” He glares, his expression grim and unyielding. “Make me coffee,” he grunts, dismissing the night with a cold flick of his fingers.