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2020s 2023 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_tongue blush blushing_male bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing commision commision_art completely_nude completely_nude_male crying dazed digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue edit edited english_text evilbeetle fontcest from_front_position genitals grabbing_leg heart-shaped_pupils heart_eyes incest intraspecies large_filesize long_image male male/male male_only maledom malesub monster monster_boy multiple_images nude nude_male orange_blush orange_penis overstimulation papyrus papyrus_(undertale) papysans partially_colored penetration penis sans sans_(undertale) seme_papyrus sequence sequential sequential_art sex sibling_incest siblings simple_background skeleton sketch speech_bubble submissive submissive_male tall_image tears text text_bubble third-party_edit thrusting tongue top_papyrus trembling trembling_legs twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

2020s 2023 2boys 2d 2d_(artwork)animated_skeleton artist_name beetleevil blue_blush blue_tongue blush blushing_male bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing commision commision_art completely_nude completely_nude_male crying dazed digital_media_(artwork)dominant dominant_male duo ectopenis ectoplasm ectotongue edit edited english_text evilbeetle fontcest from_front_position genitals grabbing_leg heart-shaped_pupils heart_eyes incest intraspecies large_filesize long_image male male/male male_only maledom malesub monster monster_boy multiple_images nude nude_male orange_blush orange_penis overstimulation papyrus papyrus_(undertale)papysans partially_colored penetration penis sans sans_(undertale)seme_papyrus sequence sequential sequential_art sex sibling_incest siblings simple_background skeleton sketch speech_bubble submissive submissive_male tall_image tears text text_bubble third-party_edit thrusting tongue top_papyrus trembling trembling_legs twitter uke_sans undead undertale undertale_(series)video_game_character video_games yaoi

2020s 2023 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_tongue blush blushing_male bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing commision commision_art completely_nude completely_nude_male crying dazed digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue edit edited english_text evilbeetle fontcest from_front_position genitals grabbing_leg heart-shaped_pupils heart_eyes incest intraspecies large_filesize long_image male male/male male_only maledom malesub monster monster_boy multiple_images nude nude_male orange_blush orange_penis overstimulation papyrus papyrus_(undertale) papysans partially_colored penetration penis sans sans_(undertale) seme_papyrus sequence sequential sequential_art sex sibling_incest siblings simple_background skeleton sketch speech_bubble submissive submissive_male tall_image tears text text_bubble third-party_edit thrusting tongue top_papyrus trembling trembling_legs twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

1boy 1cuntboy 2d 2d_(artwork) 3_girls almost_caught alphys animated_skeleton anthro apron big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_clitoris blue_pussy blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clitoris clothed comic comic_page comic_panel cuntboy cuntboy_penetrated digital_media_(artwork) dinosaur dinosaur_girl duo duo_focus ectopenis ectopussy edit edited eli-sin-g english_text female_anthro fontcest frisk frisk_(undertale) from_behind_position from_front_position genitals grabbing_arms grabbing_from_behind grabbing_leg human humanoid incest intraspecies kitchen kolesjoie larger_male larger_penetrating leg_grab lizard lizard_girl long_image male male/cuntboy male_focus male_penetrating male_penetrating_cuntboy monochrome monster monster_boy monster_girl on_counter onomatopoeia orange_blush orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pussy reptile reptile_girl sans sans_(undertale) scalie scalie_female seme_papyrus sequence sequential sex sex_from_behind sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble spot_color stealth_sex talking tall_image text text_bubble third-party_edit top_papyrus toriel uke_sans undead undertale undertale_(series) undyne vaginal video_game_character video_games yaoi

2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton artist_name beetleevil blue_blush blue_tongue blush blushing_male bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing commision commision_art completely_nude completely_nude_male crying dazed digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue english_text evilbeetle fontcest from_front_position genitals grabbing_leg incest intraspecies male male/male male_only maledom malesub monster monster_boy nude nude_male orange_blush orange_penis overstimulation papyrus papyrus_(undertale) papysans penetration penis sans sans_(undertale) seme_papyrus sequence sequential sequential_art sex sibling_incest siblings simple_background skeleton sketch speech_bubble submissive submissive_male tears text text_bubble thrusting tongue top_papyrus trembling trembling_legs twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi