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ambiguous_gender anonymous antennae anthro crying disembodied_hands drooling excessive_cum feline fingering fingering_pussy furry honeybears hybrid moaning_in_pleasure multiple_hands orange_cum orange_tongue pinned_down pussy pussy_juice sparfy_(stariiuez) stariiuez sweat sweating table table_sex tears_in_eyes tears_of_pleasure two_tails wings
ambiguous_gender anonymous antennae anthro crying disembodied_hands drooling excessive_cum feline fingering fingering_pussy furry honeybears hybrid moaning_in_pleasure multiple_hands orange_cum orange_tongue pinned_down pussy pussy_juice sparfy_(stariiuez) stariiuez sweat sweating table table_sex tears_in_eyes tears_of_pleasure two_tails wings
1futa bive_(regretevator) black_hair black_skin black_tail black_tie blush_lines brown_belt brown_clothing brown_coat brown_pants clothed clothed_female clothing dickgirl emoji flabbergasted futanari glasses gray_teeth mostly_clothed mostly_clothed_female orange_tongue pawpads paws penis penis_out pink_blush pyralspite regretevator roblox roblox_game source_request split_(regretevator)
1futa bive_(regretevator) black_hair black_skin black_tail black_tie blush_lines brown_belt brown_clothing brown_coat brown_pants clothed clothed_female clothing dickgirl emoji flabbergasted futanari glasses gray_teeth mostly_clothed mostly_clothed_female orange_tongue pawpads paws penis penis_out pink_blush pyralspite regretevator roblox roblox_game source_request split_(regretevator)
2010s 2015 2boys 2d 2d_(artwork) 2males animated_skeleton arm_support bad_id bad_tumblr_id big_penis bigger_male blue_background bodily_fluids bottom_sans brother brother/brother brother_and_brother brothers closed_eyes clothed clothed_male clothing digital_media_(artwork) duo ectopenis ectotongue erection fellatio fluids fontcest genitals gloves hooded_jacket hoodie inactive_account incest intraspecies jacket larger_male male male/male male_only monster monster_boy noxiousaberration open_mouth oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis penis_grab penis_through_clothing sans sans_(undertale) scarf seme_papyrus sex sibling_incest siblings skeleton smaller_male solo_focus sweat testicles third-party_source tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) 2males animated_skeleton arm_support bad_id bad_tumblr_id big_penis bigger_male blue_background bodily_fluids bottom_sans brother brother/brother brother_and_brother brothers closed_eyes clothed clothed_male clothing digital_media_(artwork) duo ectopenis ectotongue erection fellatio fluids fontcest genitals gloves hooded_jacket hoodie inactive_account incest intraspecies jacket larger_male male male/male male_only monster monster_boy noxiousaberration open_mouth oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis penis_grab penis_through_clothing sans sans_(undertale) scarf seme_papyrus sex sibling_incest siblings skeleton smaller_male solo_focus sweat testicles third-party_source tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
1boy 1cuntboy 2010s 2016 2d 2d_(artwork) ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media_(artwork) duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi
1boy 1cuntboy 2010s 2016 2d 2d_(artwork) ahegao animated_skeleton artist_name blue_blush blue_body blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_cuntboy brother brother/brother brother_and_brother brother_penetrating_brother brothers brown_background carrying carrying_partner carrying_position clothed clothing cuntboy cuntboy_penetrated digital_media_(artwork) duo ectobody ectopenis ectoplasm ectopussy ectotongue english_text fangs fontcest gasterass genitals gradient_legwear heart-shaped_pupils incest intraspecies legwear male male/cuntboy male_penetrating male_penetrating_cuntboy monster monster_boy nude orange_body orange_penis orange_tongue orsnge_blush papyrus papyrus_(undertale) papysans penetration penis pleasure_face profanity pussy sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton solid_color_background speech_bubble stockings talking talking_to_another talking_to_partner text thighhighs tongue tongue_out top_papyrus topwear two-tone_legwear two_tone_legwear uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_on_top bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media_(artwork) duo ectopenis ectotongue fontcest from_front_position goma_dango_555 green_socks incest intraspecies kneeling larger_male larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy orange_blush orange_socks orange_tongue papyrus papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis pixiv_id_49095896 power_bottom saliva saliva_trail sans sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton smaller_penetrated socks socks_on solid_color_background sweat tongue tongue_out toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_on_top bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed digital_media_(artwork) duo ectopenis ectotongue fontcest from_front_position goma_dango_555 green_socks incest intraspecies kneeling larger_male larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating monster monster_boy orange_blush orange_socks orange_tongue papyrus papyrus_(undertale) papysans partially_clothed penetration penetration_from_front penis pixiv_id_49095896 power_bottom saliva saliva_trail sans sans_(undertale) seme_papyrus sex sex_from_front sibling_incest siblings simple_background skeleton smaller_penetrated socks socks_on solid_color_background sweat tongue tongue_out toony top_papyrus topwear uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath yaoi
2020s 2021 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothes_lift crying digital_media_(artwork) duo ectopenis ectoplasm ectotongue fontcest from_front_position goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating mastery_position monster monster_boy orange_blush orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_clothed partially_colored penetration penetration_from_front penis pixiv_id_49095896 riding riding_penis sans sans_(undertale) seme_papyrus sex sex_from_front shirt_lift sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on sweat tears tongue tongue_out toony top_papyrus uke_sans undead undertale undertale_(series) video_games yaoi
2020s 2021 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothes_lift crying digital_media_(artwork) duo ectopenis ectoplasm ectotongue fontcest from_front_position goma_dango_555 incest intraspecies larger_penetrating larger_penetrating_smaller making_out male male_only male_penetrating mastery_position monster monster_boy orange_blush orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_clothed partially_colored penetration penetration_from_front penis pixiv_id_49095896 riding riding_penis sans sans_(undertale) seme_papyrus sex sex_from_front shirt_lift sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom socks socks_on sweat tears tongue tongue_out toony top_papyrus uke_sans undead undertale undertale_(series) video_games yaoi
2020s 2021 2boys 2d 2d_(artwork) absurd_res animated_skeleton artist_name black_bottomwear black_clothing black_pants blue_blush blue_clothing blue_eye blue_hoodie blue_jacket blue_penis blue_topwear blush blush_lines blushing_male bodily_fluids bone boots bottom_sans bottomwear brother brother/brother brother_and_brother brothers candy candy_cane christmas christmas_clothing christmas_headwear christmas_sweater christmas_topwear clothed clothing covering_mouth covering_own_mouth dessert digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue english_text fluids fontcest food food_fetish food_insertion food_play footwear ganzooky genital_fluids genitals gloves glowing glowing_eye green_background greeting_card hand_on_mouth hat headgear headwear hi_res holidays hooded_jacket hoodie improvised_sex_toy incest intraspecies jacket legs_apart male male/male male_only maledom malesub merry_christmas monster monster_boy nsfwsinningsans object_insertion orange_blush orange_tongue pants papyrus papyrus_(undertale) papysans pattern_bottomwear pattern_clothing pattern_pants penis pink_footwear pink_slippers precum red_boots red_clothing red_footwear red_gloves red_ribbon ribbon ribbon_on_penis sans sans_(undertale) santa_hat seme_papyrus sibling_incest siblings sitting skeleton slippers snow socks sounding spread_legs striped_bottomwear striped_clothing striped_pants stripes submissive submissive_male sweater text tongue tongue_out top_papyrus topwear translucent_penis two-tone_background uke_sans undead undertale undertale_(series) urethral urethral_insertion video_games white_border yaoi
2020s 2021 2boys 2d 2d_(artwork) absurd_res animated_skeleton artist_name black_bottomwear black_clothing black_pants blue_blush blue_clothing blue_eye blue_hoodie blue_jacket blue_penis blue_topwear blush blush_lines blushing_male bodily_fluids bone boots bottom_sans bottomwear brother brother/brother brother_and_brother brothers candy candy_cane christmas christmas_clothing christmas_headwear christmas_sweater christmas_topwear clothed clothing covering_mouth covering_own_mouth dessert digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue english_text fluids fontcest food food_fetish food_insertion food_play footwear ganzooky genital_fluids genitals gloves glowing glowing_eye green_background greeting_card hand_on_mouth hat headgear headwear hi_res holidays hooded_jacket hoodie improvised_sex_toy incest intraspecies jacket legs_apart male male/male male_only maledom malesub merry_christmas monster monster_boy nsfwsinningsans object_insertion orange_blush orange_tongue pants papyrus papyrus_(undertale) papysans pattern_bottomwear pattern_clothing pattern_pants penis pink_footwear pink_slippers precum red_boots red_clothing red_footwear red_gloves red_ribbon ribbon ribbon_on_penis sans sans_(undertale) santa_hat seme_papyrus sibling_incest siblings sitting skeleton slippers snow socks sounding spread_legs striped_bottomwear striped_clothing striped_pants stripes submissive submissive_male sweater text tongue tongue_out top_papyrus topwear translucent_penis two-tone_background uke_sans undead undertale undertale_(series) urethral urethral_insertion video_games white_border yaoi
! 2020s 2022 2boys 2d 2d_(artwork) abosinsin animated_skeleton artist_name bad_id bad_twitter_id bigger_male blush blushing_male brother brother/brother brother_and_brother brothers clothed clothing comic_sans digital_media_(artwork) drinking_straw duo ectotongue english_text fontcest horny horny_male humanoid implied_incest inactive_account larger_male male male/male male_only monster monster_boy orange_tongue papyrus papyrus_(font) papyrus_(undertale) papysans plastic_cup sans sans_(undertale) size_difference skeleton smaller_male speech_bubble talking talking_to_another text text_bubble tongue twitter_username undead undertale undertale_(series) upper_body video_game_character video_games visible_breath white_background yaoi
! 2020s 2022 2boys 2d 2d_(artwork) abosinsin animated_skeleton artist_name bad_id bad_twitter_id bigger_male blush blushing_male brother brother/brother brother_and_brother brothers clothed clothing comic_sans digital_media_(artwork) drinking_straw duo ectotongue english_text fontcest horny horny_male humanoid implied_incest inactive_account larger_male male male/male male_only monster monster_boy orange_tongue papyrus papyrus_(font) papyrus_(undertale) papysans plastic_cup sans sans_(undertale) size_difference skeleton smaller_male speech_bubble talking talking_to_another text text_bubble tongue twitter_username undead undertale undertale_(series) upper_body video_game_character video_games visible_breath white_background yaoi
2010s 2017 2boys anal animated_skeleton bed bedroom black_legwear blue_blush blue_theme blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers closed_eyes clothed clothing doggy_position door duo ectotongue english_text fluids fontcest from_behind_position hooded_jacket hoodie incest indoors intraspecies jacket legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy motion_lines mounting on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings skeleton spookster text thrusting tongue tongue_out top_papyrus topwear uke_sans undead undertale undertale_(series) visible_breath yaoi
2010s 2017 2boys anal animated_skeleton bed bedroom black_legwear blue_blush blue_theme blue_tongue blush bodily_fluids bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers closed_eyes clothed clothing doggy_position door duo ectotongue english_text fluids fontcest from_behind_position hooded_jacket hoodie incest indoors intraspecies jacket legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy motion_lines mounting on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings skeleton spookster text thrusting tongue tongue_out top_papyrus topwear uke_sans undead undertale undertale_(series) visible_breath yaoi
! !? ... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males after_sex all_fours anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck bedroom bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel comic_sans completely_nude completely_nude_male crying cum cum_on_sheets digital_media_(artwork) doggy_position drooling duo ectopenis ectotongue edit edited ejaculation english_text extremely_large_filesize fontcest from_behind_position genitals glowing_eye hand_on_another's_chest hand_on_chest handjob handjob_while_penetrating hands_around_neck hugged_from_behind hugging incest indoors kissing kissing_cheek large_filesize larger_male larger_penetrating larger_penetrating_smaller laying_down licking_neck licking_tongue long_image looking_at_another looking_at_partner lying_down making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male monster multiple_images nude nude_male orange_blush orange_eye orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penetration_from_behind penis saliva_string saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sex sex_from_behind shirt_removed shorter_male skeleton sleeping sleeping_nude sleeping_together smaller_male smaller_penetrated soul soul_sex speech_bubble spoken_ellipsis spoken_exclamation_mark spoken_exclamation_point taking_off_clothes talking talking_to_another tall_image taller_male tears text text_bubble third-party_edit tongue tongue_out top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressed undressing undressing_another undressing_partner video_game_character video_games wake_up yaoi zzz
! !? ... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males after_sex all_fours anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck bedroom bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel comic_sans completely_nude completely_nude_male crying cum cum_on_sheets digital_media_(artwork) doggy_position drooling duo ectopenis ectotongue edit edited ejaculation english_text extremely_large_filesize fontcest from_behind_position genitals glowing_eye hand_on_another's_chest hand_on_chest handjob handjob_while_penetrating hands_around_neck hugged_from_behind hugging incest indoors kissing kissing_cheek large_filesize larger_male larger_penetrating larger_penetrating_smaller laying_down licking_neck licking_tongue long_image looking_at_another looking_at_partner lying_down making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male monster multiple_images nude nude_male orange_blush orange_eye orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penetration_from_behind penis saliva_string saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sex sex_from_behind shirt_removed shorter_male skeleton sleeping sleeping_nude sleeping_together smaller_male smaller_penetrated soul soul_sex speech_bubble spoken_ellipsis spoken_exclamation_mark spoken_exclamation_point taking_off_clothes talking talking_to_another tall_image taller_male tears text text_bubble third-party_edit tongue tongue_out top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressed undressing undressing_another undressing_partner video_game_character video_games wake_up yaoi zzz
1boy 1cuntboy 2010s 2017 2d 2d_(artwork) animated_skeleton begging_to_stop blue_blush blue_body blush bottom_sans broken_glass brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel couch couch_sex crying cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male domination dubious_consent duo ectobody ectopenis ectopussy ectotongue edit edited english_text fontcest from_front_position genitals glass glowing_eye grabbing_clothing holding_glass incest intraspecies large_filesize leg_over_shoulder licking long_image male male/cuntboy male_only male_penetrating male_penetrating_cuntboy maledom missionary_position monster monster_boy multiple_images non-con non-consensual noncon nonconsensual onomatopoeia orange_blush orange_penis orange_tongue pants_around_one_leg papyrus papyrus_(undertale) papysans penetration penis_through_fly pleading profanity pussy questionable_consent rape sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_couch sibling_incest siblings skeleton sofa soul soul_sex speech_bubble submissive submissive_cuntboy supermuuh sweat talking tall_image tears teleport text text_bubble third-party_edit top_papyrus tumblr uke_sans undead undertale undertale_(series) unzipped unzipped_pants vaginal veiny_penis video_game_character video_games yandere yaoi
1boy 1cuntboy 2010s 2017 2d 2d_(artwork) animated_skeleton begging_to_stop blue_blush blue_body blush bottom_sans broken_glass brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel couch couch_sex crying cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male domination dubious_consent duo ectobody ectopenis ectopussy ectotongue edit edited english_text fontcest from_front_position genitals glass glowing_eye grabbing_clothing holding_glass incest intraspecies large_filesize leg_over_shoulder licking long_image male male/cuntboy male_only male_penetrating male_penetrating_cuntboy maledom missionary_position monster monster_boy multiple_images non-con non-consensual noncon nonconsensual onomatopoeia orange_blush orange_penis orange_tongue pants_around_one_leg papyrus papyrus_(undertale) papysans penetration penis_through_fly pleading profanity pussy questionable_consent rape sans sans_(undertale) seme_papyrus sequence sequential sex sex_on_couch sibling_incest siblings skeleton sofa soul soul_sex speech_bubble submissive submissive_cuntboy supermuuh sweat talking tall_image tears teleport text text_bubble third-party_edit top_papyrus tumblr uke_sans undead undertale undertale_(series) unzipped unzipped_pants vaginal veiny_penis video_game_character video_games yandere yaoi
2020s 2022 2boys animated_skeleton beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing duo ectoplasm ectotongue evilbeetle fontcest gloves grabbing_arm grey_background heart-shaped_pupils heart_eyes hooded_jacket hoodie incest intraspecies jacket licking male male/male male_only monster monster_boy orange_blush orange_tongue papyrus papyrus_(undertale) papysans red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus sibling_incest siblings simple_background skeleton soul soul_sex tears tears_of_pleasure top_papyrus trembling uke_sans undead undertale undertale_(series) upper_body visible_breath yaoi
2020s 2022 2boys animated_skeleton beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing duo ectoplasm ectotongue evilbeetle fontcest gloves grabbing_arm grey_background heart-shaped_pupils heart_eyes hooded_jacket hoodie incest intraspecies jacket licking male male/male male_only monster monster_boy orange_blush orange_tongue papyrus papyrus_(undertale) papysans red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus sibling_incest siblings simple_background skeleton soul soul_sex tears tears_of_pleasure top_papyrus trembling uke_sans undead undertale undertale_(series) upper_body visible_breath yaoi
2010s 2019 2boys animated_skeleton arm_support beetleevil blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers closed_eyes clothed clothing crotch_rub duo ectotongue erection erection_under_clothes erection_under_pants evilbeetle fontcest glowing glowing_genitalia grey_background grope_from_behind groping groping_from_behind hand_on_crotch hand_under_clothes hand_under_shirt incest intraspecies licking licking_neck male male/male male_only monochrome monster monster_boy one_eye_closed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton tongue top_papyrus touching_crotch uke_sans undead undertale undertale_(series) yaoi
2010s 2019 2boys animated_skeleton arm_support beetleevil blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers closed_eyes clothed clothing crotch_rub duo ectotongue erection erection_under_clothes erection_under_pants evilbeetle fontcest glowing glowing_genitalia grey_background grope_from_behind groping groping_from_behind hand_on_crotch hand_under_clothes hand_under_shirt incest intraspecies licking licking_neck male male/male male_only monochrome monster monster_boy one_eye_closed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton tongue top_papyrus touching_crotch uke_sans undead undertale undertale_(series) yaoi
2010s 2016 2boys 2d 2d_(artwork) amortem-kun animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_slippers blush boots bottom_sans brother brother/brother brother_and_brother brothers chair clothed clothing couch digital_media_(artwork) duo ectotongue fontcest formal formal_clothes formal_wear furniture gloves green_couch hand_in_pocket hands_on_hips height_difference hooded_jacket hoodie incest jacket kissing larger_male licking licking_neck male male/male male_only monster monster_boy multiple_views neck_tie necktie necktie_grab orange_blush orange_necktie orange_tongue papyrus papyrus_(undertale) papysans red_boots red_gloves sans sans_(undertale) seme_papyrus shoes shorter_male sibling_incest siblings simple_background sitting_on_couch sitting_on_sofa size_difference skeleton slippers small_sub smaller_male smaller_sub smaller_sub_bigger_dom sofa standing standing_on_chair standing_on_stool stool suit taller_male top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2010s 2016 2boys 2d 2d_(artwork) amortem-kun animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_slippers blush boots bottom_sans brother brother/brother brother_and_brother brothers chair clothed clothing couch digital_media_(artwork) duo ectotongue fontcest formal formal_clothes formal_wear furniture gloves green_couch hand_in_pocket hands_on_hips height_difference hooded_jacket hoodie incest jacket kissing larger_male licking licking_neck male male/male male_only monster monster_boy multiple_views neck_tie necktie necktie_grab orange_blush orange_necktie orange_tongue papyrus papyrus_(undertale) papysans red_boots red_gloves sans sans_(undertale) seme_papyrus shoes shorter_male sibling_incest siblings simple_background sitting_on_couch sitting_on_sofa size_difference skeleton slippers small_sub smaller_male smaller_sub smaller_sub_bigger_dom sofa standing standing_on_chair standing_on_stool stool suit taller_male top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
1:1 1:1_aspect_ratio 1boy 1girl 2010s 2017 2d 2d_(artwork) animated_skeleton artist_name big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother brother/brother brother/sister brother_and_brother brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest jacket licking licking_nipples male memeshero monster nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed redraw sans sans_(undertale) siblings simple_background sister skeleton sucking_nipples tumblr undead undertale undertale_(series) video_game_character video_games
1:1 1:1_aspect_ratio 1boy 1girl 2010s 2017 2d 2d_(artwork) animated_skeleton artist_name big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother brother/brother brother/sister brother_and_brother brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest jacket licking licking_nipples male memeshero monster nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed redraw sans sans_(undertale) siblings simple_background sister skeleton sucking_nipples tumblr undead undertale undertale_(series) video_game_character video_games
1:1 1:1_aspect_ratio 1boy 1boy1girl 1girl 2010s 2016 2d 2d_(artwork) animated_skeleton big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother brother/sister brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest jacket licking licking_nipples male memeshero monster nipples nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) siblings simple_background sister skeleton solid_color_background sucking_nipples tumblr undead undertale undertale_(series) video_game_character video_games
1:1 1:1_aspect_ratio 1boy 1boy1girl 1girl 2010s 2016 2d 2d_(artwork) animated_skeleton big_breasts blue_blush blue_body blue_breasts blue_hoodie blue_jacket blue_nipples blush breasts brother brother/sister brother_and_sister clothed_male digital_media_(artwork) duo ectobody ectobreasts ectotongue female_sans fontcest genderswap genderswap_(mtf) grey_background hooded_jacket hoodie incest jacket licking licking_nipples male memeshero monster nipples nursing off_shoulder off_shoulders orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_clothed sans sans_(undertale) siblings simple_background sister skeleton solid_color_background sucking_nipples tumblr undead undertale undertale_(series) video_game_character video_games
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) animated_skeleton blue_blush blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals heart-shaped_pupils heart_eyes humanoid incest indoors intraspecies licking_pussy_through_clothes male male/cuntboy maledom monochrome monster monster_boy oral orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton submissive submissive_cuntboy titleze tongue tongue_in_pussy top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) animated_skeleton blue_blush blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals heart-shaped_pupils heart_eyes humanoid incest indoors intraspecies licking_pussy_through_clothes male male/cuntboy maledom monochrome monster monster_boy oral orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton submissive submissive_cuntboy titleze tongue tongue_in_pussy top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) ? animated_skeleton blank_speech_bubble blue_blush blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals humanoid incest indoors intraspecies licking_pussy_through_clothes long_tongue male male/cuntboy maledom monochrome monster monster_boy oral orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_in_pussy top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) ? animated_skeleton blank_speech_bubble blue_blush blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals humanoid incest indoors intraspecies licking_pussy_through_clothes long_tongue male male/cuntboy maledom monochrome monster monster_boy oral orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_in_pussy top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) animated_skeleton blank_speech_bubble blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals humanoid incest indoors intraspecies licking_pussy_through_clothes male male/cuntboy maledom monochrome monster monster_boy oral orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_in_pussy tongue_out top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
1boy 1cuntboy 2010s 2018 2d 2d_(artwork) animated_skeleton blank_speech_bubble blue_pussy blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cunnilingus cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue fontcest genitals humanoid incest indoors intraspecies licking_pussy_through_clothes male male/cuntboy maledom monochrome monster monster_boy oral orange_tongue papyrus papyrus_(undertale) papysans partially_colored pussy pussy_through_clothing sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_in_pussy tongue_out top_papyrus uke_sans undead undertale undertale_(series) vaginal video_games yaoi
... 1boy 1cuntboy 2010s 2018 2d animated_skeleton bent_over blank_speech_bubble blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectotongue fontcest grabbing_ass humanoid imminent_cunnilingus imminent_oral incest indoors intraspecies male male/cuntboy maledom monochrome monster monster_boy one_eye_closed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) wink yaoi
... 1boy 1cuntboy 2010s 2018 2d animated_skeleton bent_over blank_speech_bubble blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed comic comic_page comic_panel cuntboy cuntboysub digital_media_(artwork) dominant dominant_male duo ectotongue fontcest grabbing_ass humanoid imminent_cunnilingus imminent_oral incest indoors intraspecies male male/cuntboy maledom monochrome monster monster_boy one_eye_closed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton speech_bubble submissive submissive_cuntboy titleze tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) wink yaoi
13thcatofthegate 2010s 2018 2boys 2males animated_skeleton bigger_male blue_blush blush bottom_sans brother/brother brothers comic comic_page comic_panel comic_sans duo ectotongue english_text fontcest gay incest indoors larger_male licking licking_neck male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential shorter_male skeleton smaller_male soul soul_sex speech_bubble taller_male text text_bubble tongue top_papyrus topless topless_male uke_sans undead undertale undertale_(series) yaoi
13thcatofthegate 2010s 2018 2boys 2males animated_skeleton bigger_male blue_blush blush bottom_sans brother/brother brothers comic comic_page comic_panel comic_sans duo ectotongue english_text fontcest gay incest indoors larger_male licking licking_neck male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential shorter_male skeleton smaller_male soul soul_sex speech_bubble taller_male text text_bubble tongue top_papyrus topless topless_male uke_sans undead undertale undertale_(series) yaoi
... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males animated_skeleton bigger_male blue_blush blue_tongue blush brother/brother brothers comic comic_page comic_panel comic_sans digital_media_(artwork) duo ectotongue english_text fontcest gay hand_on_another's_chest hand_on_chest incest indoors kissing kissing_cheek larger_male licking_tongue making_out male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) shirt_removed shorter_male skeleton smaller_male speech_bubble spoken_ellipsis taking_off_clothes taller_male text text_bubble tongue topless topless_male undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games yaoi
... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males animated_skeleton bigger_male blue_blush blue_tongue blush brother/brother brothers comic comic_page comic_panel comic_sans digital_media_(artwork) duo ectotongue english_text fontcest gay hand_on_another's_chest hand_on_chest incest indoors kissing kissing_cheek larger_male licking_tongue making_out male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) shirt_removed shorter_male skeleton smaller_male speech_bubble spoken_ellipsis taking_off_clothes taller_male text text_bubble tongue topless topless_male undead undertale undertale_(series) undressing undressing_another undressing_partner video_game_character video_games yaoi
! 13thcatofthegate 2010s 2018 2boys 2males animated_skeleton bigger_male blue_blush blue_tongue blush brother brother/brother brother_and_brother brothers comic comic_page comic_panel comic_sans crying cuddling duo ectotongue english_text fontcest gay hugging incest indoors kissing larger_male making_out male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored saliva_string saliva_trail sans sans_(undertale) sequence sequential shorter_male skeleton smaller_male speech_bubble spoken_exclamation_mark spoken_exclamation_point taller_male tears text text_bubble tongue undead undertale undertale_(series) wake_up yaoi
! 13thcatofthegate 2010s 2018 2boys 2males animated_skeleton bigger_male blue_blush blue_tongue blush brother brother/brother brother_and_brother brothers comic comic_page comic_panel comic_sans crying cuddling duo ectotongue english_text fontcest gay hugging incest indoors kissing larger_male making_out male male/male male_only monster orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored saliva_string saliva_trail sans sans_(undertale) sequence sequential shorter_male skeleton smaller_male speech_bubble spoken_exclamation_mark spoken_exclamation_point taller_male tears text text_bubble tongue undead undertale undertale_(series) wake_up yaoi
... 2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum cum_on_face cumshot digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_cum orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male sweat tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
... 2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel cum cum_on_face cumshot digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue ejaculation elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_cum orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis sans sans_(undertale) seme_papyrus semen_on_face sequence sequential skeleton submissive submissive_male sweat tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name black_background blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothed_male clothing comic comic_page comic_panel digital_media_(artwork) dirty_talk dominant dominant_male domination dubious_consent duo echoheartx ectopenis ectotongue elegantfolly english_text fellatio fontcest fully_clothed fully_clothed_male gay gloves grabbing_head head_grab hooded_jacket hoodie incest jacket licking_penis male male/male male_only maledom malesub monochrome monster oral orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_colored penis prehensile_penis profanity sans sans_(undertale) seme_papyrus sequence sequential sitting skeleton submissive submissive_male tentacle_penis text tongue top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton bed bedroom blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chinese_text clothed comic digital_media_(artwork) duo ectotongue edit edited fontcest gay incest indoors interlocked_fingers intertwined_fingers intraspecies long_image making_out male male/male male_only monochrome monster monster_boy multiple_images on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored saliva_trail sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton tall_image text text_bubble third-party_edit top_papyrus tumblr uke_sans undead undertale undertale_(series) veah-3sin video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton bed bedroom blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chinese_text clothed comic digital_media_(artwork) duo ectotongue edit edited fontcest gay incest indoors interlocked_fingers intertwined_fingers intraspecies long_image making_out male male/male male_only monochrome monster monster_boy multiple_images on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored saliva_trail sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton tall_image text text_bubble third-party_edit top_papyrus tumblr uke_sans undead undertale undertale_(series) veah-3sin video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton bed bedroom blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chinese_text clothed comic digital_media_(artwork) duo ectotongue fontcest gay incest indoors interlocked_fingers intertwined_fingers intraspecies making_out male male/male male_only monochrome monster monster_boy on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans saliva_trail sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton text text_bubble top_papyrus uke_sans undead undertale undertale_(series) upper_body veah-3sin video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton bed bedroom blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chinese_text clothed comic digital_media_(artwork) duo ectotongue fontcest gay incest indoors interlocked_fingers intertwined_fingers intraspecies making_out male male/male male_only monochrome monster monster_boy on_bed orange_blush orange_tongue papyrus papyrus_(undertale) papysans saliva_trail sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton text text_bubble top_papyrus uke_sans undead undertale undertale_(series) upper_body veah-3sin video_games yaoi
2010s 2017 animated_skeleton blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers comic comic_page comic_panel dominant dominant_male domination duo ectotongue english_text fontcest gay glowing_eye incest intraspecies licking male male_only maledom monster monster_boy non-con non-consensual noncon nonconsensual orange_tongue papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton soul soul_sex speech_bubble submissive supermuuh text text_bubble top_papyrus uke_sans undead undertale undertale_(series) yandere yaoi
2010s 2017 animated_skeleton blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers comic comic_page comic_panel dominant dominant_male domination duo ectotongue english_text fontcest gay glowing_eye incest intraspecies licking male male_only maledom monster monster_boy non-con non-consensual noncon nonconsensual orange_tongue papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton soul soul_sex speech_bubble submissive supermuuh text text_bubble top_papyrus uke_sans undead undertale undertale_(series) yandere yaoi
2010s 2016 2boys 2d 2d_(artwork) alternate_version_available anal animated_skeleton artist_name artist_watermark big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_jacket blush bottom_sans brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_sex digital_media_(artwork) drooling duo ectotongue english_text fangs fontcest from_behind from_behind_position gay gloves heart-shaped_pupils heart_eyes humanoid incest intraspecies jacket laddinger larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy onomatopoeia orange_blush orange_tongue outside papyrus papyrus_(undertale) papysans penetration penetration_from_behind penetration_through_clothes public_sex red_gloves sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom stealth_sex sweat text tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath watermark x-ray yaoi
2010s 2016 2boys 2d 2d_(artwork) alternate_version_available anal animated_skeleton artist_name artist_watermark big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_jacket blush bottom_sans brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_sex digital_media_(artwork) drooling duo ectotongue english_text fangs fontcest from_behind from_behind_position gay gloves heart-shaped_pupils heart_eyes humanoid incest intraspecies jacket laddinger larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy onomatopoeia orange_blush orange_tongue outside papyrus papyrus_(undertale) papysans penetration penetration_from_behind penetration_through_clothes public_sex red_gloves sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom stealth_sex sweat text tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games visible_breath watermark x-ray yaoi