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1boy 1girl 2d against_the_wall against_wall animated_skeleton artist_request blush canon_x_oc clothed clothed_male digital_media duo ectopenis female female_human female_penetrated femsub from_behind_position glowing glowing_penis hetero human human_penetrated interspecies male male/female male_penetrating male_penetrating_female maledom monochrome monster monster_boy oc_x_canon orange_penis original_character papyrus_(undertale) partially_clothed partially_clothed_female partially_colored penetration seme_papyrus sex sex_from_behind shorter_female skeleton straight taller_male top_papyrus undead undertale undertale_(series) video_game_character video_games
1boy 1girl 2d against_the_wall against_wall animated_skeleton artist_request blush canon_x_oc clothed clothed_male digital_media duo ectopenis female female_human female_penetrated femsub from_behind_position glowing glowing_penis hetero human human_penetrated interspecies male male/female male_penetrating male_penetrating_female maledom monochrome monster monster_boy oc_x_canon orange_penis original_character papyrus_(undertale) partially_clothed partially_clothed_female partially_colored penetration seme_papyrus sex sex_from_behind shorter_female skeleton straight taller_male top_papyrus undead undertale undertale_(series) video_game_character video_games
2010s 2017 2boys animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans brother brother/brother brother_and_brother brothers clothed duo fingers_interlocked fontcest hooded_jacket hoodie incest interlocked_fingers intertwined_fingers jacket kissing male male_only mintea_007 monster off_shoulder off_shoulders papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus skeleton top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face upper_body yaoi
2010s 2017 2boys animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans brother brother/brother brother_and_brother brothers clothed duo fingers_interlocked fontcest hooded_jacket hoodie incest interlocked_fingers intertwined_fingers jacket kissing male male_only mintea_007 monster off_shoulder off_shoulders papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus skeleton top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face upper_body yaoi
2010s 2017 2boys anal animated_skeleton arm_around_another's_neck arm_around_neck arm_around_shoulder big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush bottom_sans bottomless brother/brother brother_penetrating_brother brothers carrying carrying_partner clothed drooling duo ectopenis fontcest gay grabbing_legs incest larger_male larger_penetrating larger_penetrating_smaller legs_apart legs_spread looking_down male male/male male_penetrating monster monster_boy papyrus papyrus_(undertale) papysans penetration reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting skeleton sketch small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom thebrosgf third-party_source top_papyrus tumblr uke_sans undead undertale undertale_(series) white_background yaoi
2010s 2017 2boys anal animated_skeleton arm_around_another's_neck arm_around_neck arm_around_shoulder big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush bottom_sans bottomless brother/brother brother_penetrating_brother brothers carrying carrying_partner clothed drooling duo ectopenis fontcest gay grabbing_legs incest larger_male larger_penetrating larger_penetrating_smaller legs_apart legs_spread looking_down male male/male male_penetrating monster monster_boy papyrus papyrus_(undertale) papysans penetration reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting skeleton sketch small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom thebrosgf third-party_source top_papyrus tumblr uke_sans undead undertale undertale_(series) white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton arm_grab big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines boots bottom_sans bottomless bottomless_male brother/brother brother_and_brother brother_penetrating_brother brothers cussing dirty_talk drooling duo ectopenis english_text fontcest from_behind_position genital_fluids genitals gloves grabbing_arms grabbing_from_behind hi_res high_res highres humanoid incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monochrome monster monster_boy nude nude_male onomatopoeia pants_around_one_leg papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis penis_size_difference prison_guard_position profanity sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background size_difference skeleton sketch small_penis small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing talking_to_another talking_to_partner text thrusting tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton arm_grab big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines boots bottom_sans bottomless bottomless_male brother/brother brother_and_brother brother_penetrating_brother brothers cussing dirty_talk drooling duo ectopenis english_text fontcest from_behind_position genital_fluids genitals gloves grabbing_arms grabbing_from_behind hi_res high_res highres humanoid incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monochrome monster monster_boy nude nude_male onomatopoeia pants_around_one_leg papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis penis_size_difference prison_guard_position profanity sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background size_difference skeleton sketch small_penis small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing talking_to_another talking_to_partner text thrusting tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys ahegao animated_skeleton assisted_fellatio assisted_sex blue_tongue bondage bottom_sans bound brother_penetrating_brother brothers cum cum_in_mouth cum_on_face cum_on_tongue digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest goopynoms incest male male/male male/male/male male_only male_penetrating monochrome monster mouth_forced_open orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys ahegao animated_skeleton assisted_fellatio assisted_sex blue_tongue bondage bottom_sans bound brother_penetrating_brother brothers cum cum_in_mouth cum_on_face cum_on_tongue digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest goopynoms incest male male/male male/male/male male_only male_penetrating monochrome monster mouth_forced_open orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms imminent_fellatio imminent_oral incest male male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms imminent_fellatio imminent_oral incest male male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2016 2d 2d_(artwork) 3boys anal animated_skeleton arm_support artist_name ass bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans brother_penetrating_brother brothers clothed clothed/nude clothed_male digital_media_(artwork) elemental_creature elemental_humanoid fifithemantis fire_elemental fontcest grillby grillsans heart_eyes humanoid incest interspecies intraspecies larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy nude nude_male oral orange_blush orange_body papyrus papyrus_(undertale) papysans penis_in_mouth pink_background sans sans_(undertale) seme_grillby seme_papyrus sibling_incest siblings simple_background skeleton smaller_male smaller_penetrated solid_color_background spitroast tears third-party_source threesome top_grillby top_papyrus trio uke_sans undead undertale undertale_(series) video_games white_border yaoi
2010s 2016 2d 2d_(artwork) 3boys anal animated_skeleton arm_support artist_name ass bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blush bottom_sans brother_penetrating_brother brothers clothed clothed/nude clothed_male digital_media_(artwork) elemental_creature elemental_humanoid fifithemantis fire_elemental fontcest grillby grillsans heart_eyes humanoid incest interspecies intraspecies larger_male larger_penetrating larger_penetrating_smaller male male_only male_penetrating monster monster_boy nude nude_male oral orange_blush orange_body papyrus papyrus_(undertale) papysans penis_in_mouth pink_background sans sans_(undertale) seme_grillby seme_papyrus sibling_incest siblings simple_background skeleton smaller_male smaller_penetrated solid_color_background spitroast tears third-party_source threesome top_grillby top_papyrus trio uke_sans undead undertale undertale_(series) video_games white_border yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys ahegao animated_skeleton assisted_fellatio assisted_sex blue_tongue bondage bottom_sans bound brother_penetrating_brother brothers cum cum_in_mouth cum_on_face cum_on_tongue digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms incest male male/male male/male/male male_only male_penetrating monochrome monster mouth_forced_open orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys ahegao animated_skeleton assisted_fellatio assisted_sex blue_tongue bondage bottom_sans bound brother_penetrating_brother brothers cum cum_in_mouth cum_on_face cum_on_tongue digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms incest male male/male male/male/male male_only male_penetrating monochrome monster mouth_forced_open orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay goopynoms imminent_fellatio incest male male/male male/male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys animated_skeleton assisted_fellatio assisted_sex blue_penis blue_tongue bondage bottom_sans bound brothers digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay goopynoms imminent_fellatio incest male male/male male/male/male male_only monochrome monster mouth_forced_open orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2016 2boys 2d 2d_(artwork) alldrawnup animated_skeleton backwards_hat blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers cap couch digital_media_(artwork) dominant duo english_text fontcest gay grabbing_another's_chin grabbing_chin groping hand_under_clothes hand_under_shirt hat imminent_sex incest male male/male male_only monochrome monster official_alternate_costume one_eye_closed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sitting_on_couch sitting_on_sofa skeleton slippers sofa submissive text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2016 2boys 2d 2d_(artwork) alldrawnup animated_skeleton backwards_hat blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers cap couch digital_media_(artwork) dominant duo english_text fontcest gay grabbing_another's_chin grabbing_chin groping hand_under_clothes hand_under_shirt hat imminent_sex incest male male/male male_only monochrome monster official_alternate_costume one_eye_closed papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sitting_on_couch sitting_on_sofa skeleton slippers sofa submissive text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2016 2boys animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans bottomless brother/brother brothers duo fontcest gay gloves grabbing_leg hooded_jacket hoodie imminent_sex incest jacket leg_grab male male/male monster orange_blush papyrus papyrus_(undertale) papysans red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus skeleton top_papyrus topless topless_male typhadog uke_sans undead undertale undertale_(series) yaoi
2010s 2016 2boys animated_skeleton blue_blush blue_hoodie blue_jacket blush bottom_sans bottomless brother/brother brothers duo fontcest gay gloves grabbing_leg hooded_jacket hoodie imminent_sex incest jacket leg_grab male male/male monster orange_blush papyrus papyrus_(undertale) papysans red_gloves red_scarf sans sans_(undertale) scarf seme_papyrus skeleton top_papyrus topless topless_male typhadog uke_sans undead undertale undertale_(series) yaoi
animated_skeleton artist_request ball_gag blindfold blindfolded bottom_sans bottomless dildo english_text fontcest grey_background implied_incest implied_yaoi incest kidnapped male_only monochrome monster muffled out_of_frame papyrus papyrus_(font) papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus simple_background skeleton solid_color_background solo_focus speech_bubble text text_bubble tied_arms tied_up top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face vibrator
animated_skeleton artist_request ball_gag blindfold blindfolded bottom_sans bottomless dildo english_text fontcest grey_background implied_incest implied_yaoi incest kidnapped male_only monochrome monster muffled out_of_frame papyrus papyrus_(font) papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus simple_background skeleton solid_color_background solo_focus speech_bubble text text_bubble tied_arms tied_up top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face vibrator
2010s 2017 2boys animated_skeleton blue_blush blush boots bottom_sans brother/brother brothers clothed clothing comic_sans couch duo english_text fontcest gay grabbing_leg grope grope_from_behind groping groping_from_behind hand_in_pants hand_under_clothes imminent_sex incest indoors male male/male monochrome monster one_eye_closed orange_blush pants papyrus papyrus_(font) papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus shirt shirt_up sitting sitting_on_couch sitting_on_sofa skeleton sofa sweat text top_papyrus touching_crotch uke_sans undead undertale undertale_(series) unknown_artist yaoi
2010s 2017 2boys animated_skeleton blue_blush blush boots bottom_sans brother/brother brothers clothed clothing comic_sans couch duo english_text fontcest gay grabbing_leg grope grope_from_behind groping groping_from_behind hand_in_pants hand_under_clothes imminent_sex incest indoors male male/male monochrome monster one_eye_closed orange_blush pants papyrus papyrus_(font) papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus shirt shirt_up sitting sitting_on_couch sitting_on_sofa skeleton sofa sweat text top_papyrus touching_crotch uke_sans undead undertale undertale_(series) unknown_artist yaoi
2010s 2d 2d_(artwork) anal animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers comic digital_media_(artwork) duo ectopenis eli-sin-g english_text fingers_interlocked fontcest hypnotized incest interlocked_fingers intertwined_fingers intraspecies kolesjoie male mind_control monster monster_boy orange_blush orange_penis papyrus papyrus_(undertale) papysans penetration penis sans sans_(undertale) seme_papyrus sequence sequential sex sibling_incest siblings skeleton sweat text tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2d 2d_(artwork) anal animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers comic digital_media_(artwork) duo ectopenis eli-sin-g english_text fingers_interlocked fontcest hypnotized incest interlocked_fingers intertwined_fingers intraspecies kolesjoie male mind_control monster monster_boy orange_blush orange_penis papyrus papyrus_(undertale) papysans penetration penis sans sans_(undertale) seme_papyrus sequence sequential sex sibling_incest siblings skeleton sweat text tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s animated_skeleton blue_blush blue_tongue blush bottom_sans bouncing_penis brother brother/brother brother_and_brother brothers comic cum cum_in_mouth eli-sin-g english_text fellatio fontcest hypnotized incest intraspecies irrumatio kolesjoie male mind_control monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton swallowing_cum text tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) yaoi
2010s animated_skeleton blue_blush blue_tongue blush bottom_sans bouncing_penis brother brother/brother brother_and_brother brothers comic cum cum_in_mouth eli-sin-g english_text fellatio fontcest hypnotized incest intraspecies irrumatio kolesjoie male mind_control monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings skeleton swallowing_cum text tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) yaoi
1boy 1cuntboy 2010s 2016 2d 2d_(artwork) animated_skeleton bottom_sans brother/brother brother_penetrating_brother brothers comic comic_page cum cum_in_pussy cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant_male duo ectopenis ectopussy eli-sin-g english_text fontcest genitals incest kolesjoie male male/cuntboy male_penetrating male_penetrating_cuntboy maledom monster papyrus papyrus_(font) papyrus_(undertale) papysans penetration penis pussy sans sans_(undertale) seme_papyrus sequence sequential sex skeleton submissive_cuntboy text top_papyrus uke_sans undead undertale undertale_(series) vaginal veiny_penis video_game_character video_games yaoi
1boy 1cuntboy 2010s 2016 2d 2d_(artwork) animated_skeleton bottom_sans brother/brother brother_penetrating_brother brothers comic comic_page cum cum_in_pussy cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant_male duo ectopenis ectopussy eli-sin-g english_text fontcest genitals incest kolesjoie male male/cuntboy male_penetrating male_penetrating_cuntboy maledom monster papyrus papyrus_(font) papyrus_(undertale) papysans penetration penis pussy sans sans_(undertale) seme_papyrus sequence sequential sex skeleton submissive_cuntboy text top_papyrus uke_sans undead undertale undertale_(series) vaginal veiny_penis video_game_character video_games yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue bodily_fluids boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers crying crying_with_eyes_open digital_media_(artwork) drooling duo ectopenis ectoplasm english_text fluids fontcest gay heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male missionary_position monster monster_boy non-con non-consensual noncon nonconsensual nude nude_male orange_penis papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis rape safeword sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble thrusting tongue top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue bodily_fluids boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers crying crying_with_eyes_open digital_media_(artwork) drooling duo ectopenis ectoplasm english_text fluids fontcest gay heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male missionary_position monster monster_boy non-con non-consensual noncon nonconsensual nude nude_male orange_penis papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis rape safeword sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble thrusting tongue top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020 2020s 2boys 2d anal animated_skeleton big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_border blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers carrying carrying_partner chair clothed comic_sans commission covering_another's_mouth covering_mouth digital_media drooling duo ectoplasm english_text fontcest gay humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating moaning monster monster_boy orange_blush outdoor_sex outdoors pants pants_around_one_leg papyrus papyrus_(font) papyrus_(undertale) papysans penetration public_sex reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting sitting_on_chair skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat text text_bubble top_papyrus twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020 2020s 2boys 2d anal animated_skeleton big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_border blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers carrying carrying_partner chair clothed comic_sans commission covering_another's_mouth covering_mouth digital_media drooling duo ectoplasm english_text fontcest gay humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating moaning monster monster_boy orange_blush outdoor_sex outdoors pants pants_around_one_leg papyrus papyrus_(font) papyrus_(undertale) papysans penetration public_sex reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting sitting_on_chair skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat text text_bubble top_papyrus twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2022 2boys anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bleeding blood blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed crying crying_with_eyes_open defloration deflowering drooling duo ectopenis ectoplasm english_text fontcest gay grabbing_arms grey_background humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating monochrome monster monster_boy non-con non-consensual noncon nonconsensual nude onomatopoeia orange_blush papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penis rape sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) yaoi
2020s 2022 2boys anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bleeding blood blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed crying crying_with_eyes_open defloration deflowering drooling duo ectopenis ectoplasm english_text fontcest gay grabbing_arms grey_background humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating monochrome monster monster_boy non-con non-consensual noncon nonconsensual nude onomatopoeia orange_blush papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penis rape sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background sitting skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) yaoi
2021 2boys 2d animated_skeleton big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother/brother brother_penetrating_brother brothers cussing duo ectopenis english_text fontcest gay grabbing_head head_grab heart-shaped_pupils heart_eyes humanoid incest intraspecies irrumatio larger_male larger_penetrating male male/male male_penetrating monochrome monster monster_boy multiple_views papyrus papyrus_(undertale) papysans penetration penis profanity pushing_head_towards_fellatio sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton sketch sleeping small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing text tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi zzz
2021 2boys 2d animated_skeleton big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bottom_sans brother/brother brother_penetrating_brother brothers cussing duo ectopenis english_text fontcest gay grabbing_head head_grab heart-shaped_pupils heart_eyes humanoid incest intraspecies irrumatio larger_male larger_penetrating male male/male male_penetrating monochrome monster monster_boy multiple_views papyrus papyrus_(undertale) papysans penetration penis profanity pushing_head_towards_fellatio sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton sketch sleeping small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing text tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi zzz
2010s 2017 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bondage bottom_sans brother brothers clothed digital_media_(artwork) duo eggford erection erection_under_clothes fontcest genital_fluids incest kneel kneeling looking_at_another looking_back looking_back_at_another male male/male male_only monster orange_background papyrus papyrus_(undertale) papysans partial_male penis precum precum_through_clothing sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom solo_focus tied_up top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2017 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bondage bottom_sans brother brothers clothed digital_media_(artwork) duo eggford erection erection_under_clothes fontcest genital_fluids incest kneel kneeling looking_at_another looking_back looking_back_at_another male male/male male_only monster orange_background papyrus papyrus_(undertale) papysans partial_male penis precum precum_through_clothing sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom solo_focus tied_up top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_background blue_penis bottom_sans brother_penetrating_brother brothers clothed clothed/nude digital_media_(artwork) duo duplicate ectopenis fontcest gay grabbing_from_behind grabbing_mouth incest larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy noxiousaberration nude open_mouth orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tongue tongue_grab tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_background blue_penis bottom_sans brother_penetrating_brother brothers clothed clothed/nude digital_media_(artwork) duo duplicate ectopenis fontcest gay grabbing_from_behind grabbing_mouth incest larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy noxiousaberration nude open_mouth orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solo_focus tongue tongue_grab tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2018 2boys animated_skeleton blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed duo fontcest fontgalore grabbing_face grey_background hand incest male male_only monster one_eye_closed out_of_frame pancakepants papyrus papyrus_(undertale) papysans saliva saliva_on_finger saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus skeleton solid_color_background solo_focus submissive tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body yaoi
2010s 2018 2boys animated_skeleton blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed duo fontcest fontgalore grabbing_face grey_background hand incest male male_only monster one_eye_closed out_of_frame pancakepants papyrus papyrus_(undertale) papysans saliva saliva_on_finger saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus skeleton solid_color_background solo_focus submissive tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body yaoi
2010s 2015 2boys animated_skeleton blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers dakuyakko disembodied_penis duo fontcest heart heart-shaped_pupils incest male male_only monster orange_penis papyrus papyrus_(undertale) papysans penis penis_on_cheek penis_on_face sans sans_(undertale) seme_papyrus skeleton solo_focus top_papyrus tumblr_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face upper_body veiny_penis white_background yaoi
2010s 2015 2boys animated_skeleton blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers dakuyakko disembodied_penis duo fontcest heart heart-shaped_pupils incest male male_only monster orange_penis papyrus papyrus_(undertale) papysans penis penis_on_cheek penis_on_face sans sans_(undertale) seme_papyrus skeleton solo_focus top_papyrus tumblr_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face upper_body veiny_penis white_background yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush bottom_sans brother_penetrating_brother brothers cum_while_penetrated digital_media_(artwork) ectopenis fontcest gay humanoid incest male male/male male_focus male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus skeleton sketch solo_focus third-party_source top_papyrus uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2010s 2015 2boys 2d 2d_(artwork) animated_skeleton artist_request blue_blush blue_penis blush bottom_sans brother_penetrating_brother brothers cum_while_penetrated digital_media_(artwork) ectopenis fontcest gay humanoid incest male male/male male_focus male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male orange_penis papyrus papyrus_(undertale) papysans penis sans sans_(undertale) seme_papyrus skeleton sketch solo_focus third-party_source top_papyrus uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2d 2d_(artwork) ahegao animated_skeleton bimbaloon bottom_sans bottomless brother brothers clothed cum cum_on_body cum_on_clothes digital_media_(artwork) disembodied_penis fontcest glowing_cum hi_res hoodie incest littlegreendorito looking_pleasured male male_ahegao male_focus male_only monster orange_penis papyrus papyrus_(undertale) papysans penis pleasure_face riding_penis sans sans_(undertale) seme_papyrus skeleton solo_focus tongue_out top_papyrus tumblr_username twitter uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face video_game_character video_games yaoi
2d 2d_(artwork) ahegao animated_skeleton bimbaloon bottom_sans bottomless brother brothers clothed cum cum_on_body cum_on_clothes digital_media_(artwork) disembodied_penis fontcest glowing_cum hi_res hoodie incest littlegreendorito looking_pleasured male male_ahegao male_focus male_only monster orange_penis papyrus papyrus_(undertale) papysans penis pleasure_face riding_penis sans sans_(undertale) seme_papyrus skeleton solo_focus tongue_out top_papyrus tumblr_username twitter uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face video_game_character video_games yaoi
2boys 2d 2d_(artwork) animated_skeleton bimbaloon blue_eyes blue_tongue bottom_sans brother brothers clothed dark_background digital_media_(artwork) duo ectotongue fellatio fellatio_pov fontcest glowing_cum grabbing_penis hi_res incest licking_penis littlegreendorito long_tongue looking_at_viewer male male_focus male_only male_pov monster oral orange_body orange_penis papyrus papyrus_(undertale) papysans partial_male penis pov pov_eye_contact sans sans_(undertale) seme_papyrus skeleton solo_focus third-party_source tongue top_papyrus tumblr_username twitter uke_sans undead undertale undertale_(series) unseen_male_face upper_body video_game_character video_games yaoi
2boys 2d 2d_(artwork) animated_skeleton bimbaloon blue_eyes blue_tongue bottom_sans brother brothers clothed dark_background digital_media_(artwork) duo ectotongue fellatio fellatio_pov fontcest glowing_cum grabbing_penis hi_res incest licking_penis littlegreendorito long_tongue looking_at_viewer male male_focus male_only male_pov monster oral orange_body orange_penis papyrus papyrus_(undertale) papysans partial_male penis pov pov_eye_contact sans sans_(undertale) seme_papyrus skeleton solo_focus third-party_source tongue top_papyrus tumblr_username twitter uke_sans undead undertale undertale_(series) unseen_male_face upper_body video_game_character video_games yaoi
2boys 2d 2d_(artwork) animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_hoodie blue_jacket blue_tongue blush bottom_sans brother/brother brother_penetrating_brother brothers clothed digital_media_(artwork) drunk duo ectopenis english_text face_grab fontcest from_behind_position ganzooky gay grabbing_face highres hoodie incest intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller lying_on_snow lying_on_stomach male male/male male_only male_penetrating monster monster_boy nsfwsinningsans one_eye_closed orange_blush orange_penis outside pants_around_one_leg pants_pulled_down papyrus papyrus_(undertale) papysans penetration penetration_from_behind sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom snow sweat text tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2boys 2d 2d_(artwork) animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_hoodie blue_jacket blue_tongue blush bottom_sans brother/brother brother_penetrating_brother brothers clothed digital_media_(artwork) drunk duo ectopenis english_text face_grab fontcest from_behind_position ganzooky gay grabbing_face highres hoodie incest intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller lying_on_snow lying_on_stomach male male/male male_only male_penetrating monster monster_boy nsfwsinningsans one_eye_closed orange_blush orange_penis outside pants_around_one_leg pants_pulled_down papyrus papyrus_(undertale) papysans penetration penetration_from_behind sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom snow sweat text tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2010s 2019 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers digital_media_(artwork) duo ectopenis english_text fontcest from_front_position ganzooky gay holding_object holding_phone hoodie hoodie_only incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nsfwsinningsans orange_blush orange_penis pants_only papyrus papyrus_(undertale) papysans penetration phone phone_call sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sweat talking_on_phone text thrusting top_papyrus topless topless_male uke_sans undead undertale undertale_(series) undertale_fanfiction video_game_character video_games white_background yaoi
2010s 2019 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers digital_media_(artwork) duo ectopenis english_text fontcest from_front_position ganzooky gay holding_object holding_phone hoodie hoodie_only incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nsfwsinningsans orange_blush orange_penis pants_only papyrus papyrus_(undertale) papysans penetration phone phone_call sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sweat talking_on_phone text thrusting top_papyrus topless topless_male uke_sans undead undertale undertale_(series) undertale_fanfiction video_game_character video_games white_background yaoi
2023 2boys 2d 2d_(artwork) animated_skeleton bad_id bad_twitter_id bedroom blue_blush blue_hoodie blue_jacket blue_penis blush boots bottom_on_top bottom_sans brothers clothed dark dark_room digital_media_(artwork) duo erection erection_under_clothes fontcest fudanshipochoc gay glowing heart heart_eyes hooded_jacket hoodie imminent_sex incest indoors jacket male male/male male_only male_pov monster off_shoulder one_eye_closed orange_penis papyrus papyrus_(undertale) papysans partial_male penis_bulge pov power_bottom red_boots sans sans_(undertale) seductive seme_papyrus skeleton solo_focus top_papyrus touching_crotch twitter uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2023 2boys 2d 2d_(artwork) animated_skeleton bad_id bad_twitter_id bedroom blue_blush blue_hoodie blue_jacket blue_penis blush boots bottom_on_top bottom_sans brothers clothed dark dark_room digital_media_(artwork) duo erection erection_under_clothes fontcest fudanshipochoc gay glowing heart heart_eyes hooded_jacket hoodie imminent_sex incest indoors jacket male male/male male_only male_pov monster off_shoulder one_eye_closed orange_penis papyrus papyrus_(undertale) papysans partial_male penis_bulge pov power_bottom red_boots sans sans_(undertale) seductive seme_papyrus skeleton solo_focus top_papyrus touching_crotch twitter uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi
2010s 2018 2d 2d_(artwork) animated_skeleton begging blue_blush blush bottom_sans bottomless brother brothers clothed digital_media_(artwork) duo english_text fontcest imminent_incest imminent_sex incest monster nagisaheichou papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus skeleton text top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2d 2d_(artwork) animated_skeleton begging blue_blush blush bottom_sans bottomless brother brothers clothed digital_media_(artwork) duo english_text fontcest imminent_incest imminent_sex incest monster nagisaheichou papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus skeleton text top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
1:1 1:1_aspect_ratio 2010s 2018 2d 2d_(artwork) animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brothers chin_grab clothed digital_media_(artwork) duo ectotongue english_text face_grab fontcest food grabbing_another's_chin implied_sex incest licking licking_neck licking_popsicle monster monster_boy multiple_views orange_popsicle orange_tongue papyrus papyrus_(undertale) papysans partially_colored popsicle sans sans_(undertale) seme_papyrus skeleton spoken_musical_note suggestive_food sympharin symphysins text tongue tongue_grab tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2d 2d_(artwork) animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brothers chin_grab clothed digital_media_(artwork) duo ectotongue english_text face_grab fontcest food grabbing_another's_chin implied_sex incest licking licking_neck licking_popsicle monster monster_boy multiple_views orange_popsicle orange_tongue papyrus papyrus_(undertale) papysans partially_colored popsicle sans sans_(undertale) seme_papyrus skeleton spoken_musical_note suggestive_food sympharin symphysins text tongue tongue_grab tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2020 2020s 2boys 2d 2d_(artwork) animated_skeleton blue_eyes blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed dark dark_background digital_media_(artwork) fellatio fellatio_pov fontcest genitals glowing glowing_genitalia glowing_penis grabbing_penis incest licking licking_penis male male_only male_pov monster monster_boy oral orange_penis papyrus papyrus_(undertale) papysans penis pov sans sans_(undertale) seme_papyrus sex sinncognito skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2020 2020s 2boys 2d 2d_(artwork) animated_skeleton blue_eyes blue_tongue bottom_sans brother brother/brother brother_and_brother brothers clothed dark dark_background digital_media_(artwork) fellatio fellatio_pov fontcest genitals glowing glowing_genitalia glowing_penis grabbing_penis incest licking licking_penis male male_only male_pov monster monster_boy oral orange_penis papyrus papyrus_(undertale) papysans penis pov sans sans_(undertale) seme_papyrus sex sinncognito skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games yaoi
2boys animated_skeleton artist_name bad_id bad_twitter_id bottom_sans brothers clothed dark duo fellatio fellatio_pov fontcest glowing glowing_penis inactive_account incest looking_at_viewer male male_only male_pov monster monster_boy papyrus papyrus_(undertale) papysans pov sans sans_(undertale) seme_papyrus skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face xmatsukisinsx yaoi
2boys animated_skeleton artist_name bad_id bad_twitter_id bottom_sans brothers clothed dark duo fellatio fellatio_pov fontcest glowing glowing_penis inactive_account incest looking_at_viewer male male_only male_pov monster monster_boy papyrus papyrus_(undertale) papysans pov sans sans_(undertale) seme_papyrus skeleton solo_focus top_papyrus twitter uke_sans undead undertale undertale_(series) unseen_male unseen_male_face xmatsukisinsx yaoi
2010s 2boys alternate_version_available animated_skeleton big_penis blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers duo ectopenis eli-sin-g fontcest grabbing_leg incest kolesjoie licking_penis looking_at_viewer male male/male male_only male_pov monster one_eye_closed orange_penis papyrus papyrus_(undertale) papysans penis pov precum sans sans_(undertale) seme_papyrus sepia skeleton solo_focus sweat tongue top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face veiny_penis yaoi
2010s 2boys alternate_version_available animated_skeleton big_penis blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers duo ectopenis eli-sin-g fontcest grabbing_leg incest kolesjoie licking_penis looking_at_viewer male male/male male_only male_pov monster one_eye_closed orange_penis papyrus papyrus_(undertale) papysans penis pov precum sans sans_(undertale) seme_papyrus sepia skeleton solo_focus sweat tongue top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face veiny_penis yaoi
2010s 2boys alternate_version_available animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chocolate duo eli-sin-g fontcest food food_play grabbing_leg incest kolesjoie licking_food looking_at_viewer male male/male male_only male_pov monster one_eye_closed papyrus papyrus_(undertale) papysans pov sans sans_(undertale) seme_papyrus sepia skeleton solo_focus tongue top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face yaoi
2010s 2boys alternate_version_available animated_skeleton blue_blush blue_tongue blush bottom_sans brother brother/brother brother_and_brother brothers chocolate duo eli-sin-g fontcest food food_play grabbing_leg incest kolesjoie licking_food looking_at_viewer male male/male male_only male_pov monster one_eye_closed papyrus papyrus_(undertale) papysans pov sans sans_(undertale) seme_papyrus sepia skeleton solo_focus tongue top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face yaoi