Rule 34 Dev - 1:1 1:1_aspect_ratio 1boy 2020s 2022 animated_skeleton blush_lines bound_wrists legs_spread male male_only malesub naked nude purplebluepen45 sans sans_(undertale) skeleton socks socks_on socks_only solo spread_legs submissive submissive_male tied_up tied_wrists trembling undead undertale undertale_(series) youfoundta|9052446168