Rule 34 Dev - 2022 2d 2d_(artwork) animated_skeleton anon blue_blush blue_hoodie blue_jacket blue_tongue blush bottom_sans clothed cum_on_face digital_media_(artwork) drooling hand hooded_jacket hoodie jacket logo_(pixiv_id_30462562) looking_down monster monster_boy pixiv pov sans sans_(undertale) simple_background skeleton solo_focus submissive sweat tongue tongue_grab tongue_out uke_sans undead undertale undertale_(series) unseen_character upper_body video_game_character video_games white_background yaoi|1015504