gelbooruhttps://xbooru.com/index.php?page=atom&tags=animated skeleton ass ass up blue blush blue collar blush bodily fluids bottom sans bottomless bound wrists collar collar and leash filthysmashpeach fluids kneeling leash leash and collar looking at viewer male male only monochrome monster one eye closed partially clothed partially colored sans sans (undertale) skeleton solo solo male submissive tied wrists top-down bottom-up uke sans undead undertale undertale (series)2024-05-13T19:41:03Zgelbooru