Rule 34 Dev - 2010s 2018 2boys 2d 2d_(artwork) animated_skeleton blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bottom_sans clothed cussing digital_media_(artwork) drooling eye_fucking eye_penetration heart-shaped_pupils heart_eyes hooded_jacket hoodie jacket male male_focus male_only malesub monster penis_in_eye profanity sans sans_(undertale) skeleton skull_fucking solo_focus submissive submissive_male swearing text tongue tongue_out uke_sans undead undertale undertale_(series) unknown_artist unseen_male unseen_male_face upper_body video_game_character video_games visible_breath white_background yaoi|1023629