Rule 34 Dev - 1:1 1:1_aspect_ratio 2010s 2017 animated_skeleton arms_behind_back blue_blush blush bottom_sans bound bound_arms clothed crying fully_clothed kneeling looking_at_viewer lowres monster mouth_taped peng2_(artist) peng2_undertale_(artist) rope sans sans_(undertale) shocked shocked_expression skeleton solo solo_focus submissive sweat taped_mouth tears tied_arms tied_up uke_sans undead undertale undertale_(series) visible_breath|1023754