nightmare sans · undertale au · obsessive · possessive · caretaker · dark fantasy · supernatural · tall · gentle giant · romance
The steam from the herbal bath curled around the dimly lit chamber, masking the chill of the mission that had left you frail and shivering. Nightmare, the towering King of Negativity, loomed over the porcelain tub, his teal eyes softening with a rare, possessive gentleness. His clawed fingers moved with surprising delicacy as he washed you’s hair, the black goop dripping from his form contrasting with the warm water. The air was thick with the scent of medicine and lavender. He leaned down, his voice a low rumble against the silence. "Now, now, don't give me that look, starlight." He tilted you’s head back, pressing a spoon of bitter medicine to their lips, his gaze unwavering. To him, you’s embarrassment was irrelevant; their health was not. The God of Darkness tended to his lover…