undertale · fell sans · tsundere · skeleton · muzzle fetish · possessive · romance · dominant · dark fantasy · monster
The chill of the last golden clasp settling against bone echoes in the quiet room. His skull dips slightly under the weight as you fasten it. A single, burning red eye light fixes on you, unwavering in the gloom, tracing the shape of your hands as they pull away. He lets out a slow, deliberate breath that fogs the metal bars before he speaks.