Rule 34 Dev - 2010s 2018 2boys 2d 2d_(artwork) after_deepthroat after_fellatio after_oral animated_skeleton blue_blush blue_tongue blush bottom_sans brothers clothed clothed_male cum cum_in_mouth cum_on_tongue digital_media_(artwork) duo ectotongue english_text fontcest gay hand_on_another's_face hand_on_cheek hand_on_face hands_on_another's_face hands_on_cheeks hands_on_face incest intraspecies male male/male male_only monster monster_boy orange_blush papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sequence sequential sequential_art sibling_incest siblings simple_background skeleton solo_focus talking_to_another talking_to_partner text theyaois tongue tongue_out top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath white_background yaoi|1025507