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2018 2boys 2d anal anal_penetration anal_sex animated_skeleton armwear ass black_armwear black_bodysuit black_bottomwear black_topwear blue_blush blush blush_lines bodily_fluids bodysuit bottom_sans bottomless bottomless_male bottomwear brother/brother brother_penetrating_brother brothers clothed clothing digital_media duo ectopenis ectoplasm fluids fontcest from_above humanoid incest intraspecies leg_grab lying male male/male male_focus male_only male_penetrating male_pov mianpigui_(wqw1201501125) monster monster_boy on_back orange_penis papyrus_(undertale) papysans partial_male partially_clothed penetrating_pov penetration penetrator_pov penis pillow pov sans_(undertale) sex sibling_incest siblings sitting skeleton solo_focus spread_legs teeth tissue tissue_paper top_papyrus topwear undead undertale undertale_(series) unseen_male_face used_tissue video_games visible_breath yaoi

2018 2boys 2d anal anal_penetration anal_sex animated_skeleton armwear ass black_armwear black_bodysuit black_bottomwear black_topwear blue_blush blush blush_lines bodily_fluids bodysuit bottom_sans bottomless bottomless_male bottomwear brother/brother brother_penetrating_brother brothers clothed clothing digital_media duo ectopenis ectoplasm fluids fontcest from_above humanoid incest intraspecies leg_grab lying male male/male male_focus male_only male_penetrating male_pov mianpigui_(wqw1201501125) monster monster_boy on_back orange_penis papyrus_(undertale) papysans partial_male partially_clothed penetrating_pov penetration penetrator_pov penis pillow pov sans_(undertale) sex sibling_incest siblings sitting skeleton solo_focus spread_legs teeth tissue tissue_paper top_papyrus topwear undead undertale undertale_(series) unseen_male_face used_tissue video_games visible_breath yaoi

analanal_penetration

2018 2boys 2d ambiguous_fingering anal anal_fingering animated_skeleton armwear ass black_armwear black_bodysuit black_bottomwear black_topwear blue_blush blue_penis blush bodysuit bottom_sans bottomless bottomless_male bottomwear brother/brother brothers clothed clothed/nude clothing digital_media duo ectopenis ectoplasm ectopussy erection fingering fingering_another fingering_partner fontcest genitals gloves humanoid incest intraspecies male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male orange_blush papyrus_(undertale) papysans partially_clothed partially_colored penetration penis pussy sans_(undertale) scarf sex sibling_incest siblings sitting skeleton top_papyrus topwear trembling undead undertale undertale_(series) vaginal video_games yaoi

2018 2boys 2d ambiguous_fingering anal anal_fingering animated_skeleton armwear ass black_armwear black_bodysuit black_bottomwear black_topwear blue_blush blue_penis blush bodysuit bottom_sans bottomless bottomless_male bottomwear brother/brother brothers clothed clothed/nude clothing digital_media duo ectopenis ectoplasm ectopussy erection fingering fingering_another fingering_partner fontcest genitals gloves humanoid incest intraspecies male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male orange_blush papyrus_(undertale) papysans partially_clothed partially_colored penetration penis pussy sans_(undertale) scarf sex sibling_incest siblings sitting skeleton top_papyrus topwear trembling undead undertale undertale_(series) vaginal video_games yaoi

ambiguous_fingeringanal

... 2018 2boys 2d after_sex animated_skeleton ass blue_background blue_blush blue_penis blush blush_lines bodily_fluids bottom_sans brother/brother brothers cleaning clothed clothed/nude clothed_male_nude_male clothing completely_nude completely_nude_male cum cum_leaking digital_media duo ectopenis ectoplasm ectopussy english_text erection fluids fontcest genital_fluids genitals humanoid implied_after_sex incest intraspecies laying_on_back lying_on_back male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male one_eye_closed orange_blush pants papyrus_(undertale) papysans penis pussy ribs sans_(undertale) semen sibling_incest siblings skeleton small_penis spoken_ellipsis sweat teeth text tissue tissue_box tissue_paper top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi

... 2018 2boys 2d after_sex animated_skeleton ass blue_background blue_blush blue_penis blush blush_lines bodily_fluids bottom_sans brother/brother brothers cleaning clothed clothed/nude clothed_male_nude_male clothing completely_nude completely_nude_male cum cum_leaking digital_media duo ectopenis ectoplasm ectopussy english_text erection fluids fontcest genital_fluids genitals humanoid implied_after_sex incest intraspecies laying_on_back lying_on_back male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy nude nude_male one_eye_closed orange_blush pants papyrus_(undertale) papysans penis pussy ribs sans_(undertale) semen sibling_incest siblings skeleton small_penis spoken_ellipsis sweat teeth text tissue tissue_box tissue_paper top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi

2018 2boys 2d ambiguous_penetration anal anal_penetration anal_sex animated_skeleton ass black_background blue_penis bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing dark_background digital_media duo ectopenis ectoplasm ectopussy erection fontcest humanoid incest intraspecies kissing leg_grab leg_up male male/male male_focus male_only male_penetrating mianpigui_(wqw1201501125) monster monster_boy on_side papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis pussy red_scarf sans_(undertale) scarf sex shirt_up sibling_incest siblings simple_background skeleton sweat teeth top_papyrus undead undertale undertale_(series) video_games yaoi

2018 2boys 2d ambiguous_penetration anal anal_penetration anal_sex animated_skeleton ass black_background blue_penis bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing dark_background digital_media duo ectopenis ectoplasm ectopussy erection fontcest humanoid incest intraspecies kissing leg_grab leg_up male male/male male_focus male_only male_penetrating mianpigui_(wqw1201501125) monster monster_boy on_side papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis pussy red_scarf sans_(undertale) scarf sex shirt_up sibling_incest siblings simple_background skeleton sweat teeth top_papyrus undead undertale undertale_(series) video_games yaoi

ambiguous_penetrationanal

2023 2boys 2d animated_skeleton ass bed bottom_sans bottomless bottomless_male brother/brother brothers clothed clothing dark dark_room digital_media duo fontcest humanoid incest intraspecies kneeling male male/male male_focus male_only mianpigui_(wqw1201501125) monochrome monster monster_boy on_bed pants_around_legs pants_down pants_pulled_down papyrus_(undertale) papysans power_bottom sans_(undertale) sibling_incest siblings skeleton top_papyrus undead undertale undertale_(series) video_games yaoi

2023 2boys 2d animated_skeleton ass bed bottom_sans bottomless bottomless_male brother/brother brothers clothed clothing dark dark_room digital_media duo fontcest humanoid incest intraspecies kneeling male male/male male_focus male_only mianpigui_(wqw1201501125) monochrome monster monster_boy on_bed pants_around_legs pants_down pants_pulled_down papyrus_(undertale) papysans power_bottom sans_(undertale) sibling_incest siblings skeleton top_papyrus undead undertale undertale_(series) video_games yaoi

animated_skeletonass

... 2023 2boys 2d ? animated_skeleton ass black_pants blue_hoodie blue_jacket book bottom_sans brother/brother brothers clothed clothing digital_media duo fontcest gloves holding_book holding_object hooded_jacket hoodie humanoid implied_incest jacket looking_at_crotch looking_down male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy pants papyrus_(undertale) papysans penis red_gloves sans_(undertale) shirt_lift shirt_up siblings skeleton spoken_ellipsis sweat top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi

... 2023 2boys 2d ? animated_skeleton ass black_pants blue_hoodie blue_jacket book bottom_sans brother/brother brothers clothed clothing digital_media duo fontcest gloves holding_book holding_object hooded_jacket hoodie humanoid implied_incest jacket looking_at_crotch looking_down male male/male male_focus male_only mianpigui_(wqw1201501125) monster monster_boy pants papyrus_(undertale) papysans penis red_gloves sans_(undertale) shirt_lift shirt_up siblings skeleton spoken_ellipsis sweat top_papyrus undead undertale undertale_(series) video_game_character video_games yaoi

1boy 1girl 2016 2d animated_skeleton anonymous anonymous_female bigger_male blush blushing_male breasts cape carrying carrying_another carrying_partner closed_eyes clothed clothed/nude clothed_male clothed_male_nude_female clothing dinkynsfw duo ectopenis embarrassed embarrassed_male erection face_between_breasts face_in_breasts face_on_breast fellatio female frenulum frenum genitals gloves hetero hugging humanoid interspecies larger_male licking licking_penis looking_away male male/female monster nipples nude nude_female nude_female_clothed_male oral papyrus_(undertale) penile penis penis_grab penis_lick scarf sex skeleton smaller_female sweat teeth text top_papyrus traditional_media undead undertale undertale_(series) video_games

1boy 1girl 2016 2d animated_skeleton anonymous anonymous_female bigger_male blush blushing_male breasts cape carrying carrying_another carrying_partner closed_eyes clothed clothed/nude clothed_male clothed_male_nude_female clothing dinkynsfw duo ectopenis embarrassed embarrassed_male erection face_between_breasts face_in_breasts face_on_breast fellatio female frenulum frenum genitals gloves hetero hugging humanoid interspecies larger_male licking licking_penis looking_away male male/female monster nipples nude nude_female nude_female_clothed_male oral papyrus_(undertale) penile penis penis_grab penis_lick scarf sex skeleton smaller_female sweat teeth text top_papyrus traditional_media undead undertale undertale_(series) video_games

animated_skeletonanonymous

2023 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting giant gloves heart heart-shaped_pupils heart_eyes hoodie humanoid implied_bottomless implied_penis incest intraspecies jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia miniboy monster orange_cum orange_penis papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans_(undertale) sibling_incest siblings size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta

2023 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting giant gloves heart heart-shaped_pupils heart_eyes hoodie humanoid implied_bottomless implied_penis incest intraspecies jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia miniboy monster orange_cum orange_penis papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans_(undertale) sibling_incest siblings size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta

animated_skeletonbig_dom

1:1 2023 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bottom_sans brother/brother brothers clothed clothed/nude clothing duo fontcest grabbing_leg incest intraspecies kissing kissing_crotch larger_male leg_grab male male/male male_only monochrome monster monster_boy nude papyrus_(undertale) papysans purplebluepen45 sans_(undertale) sibling_incest siblings size_difference skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus traditional_media undead undertale undertale_(series) video_games yaoi youfoundta

1:1 2023 2boys 2d animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bottom_sans brother/brother brothers clothed clothed/nude clothing duo fontcest grabbing_leg incest intraspecies kissing kissing_crotch larger_male leg_grab male male/male male_only monochrome monster monster_boy nude papyrus_(undertale) papysans purplebluepen45 sans_(undertale) sibling_incest siblings size_difference skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus traditional_media undead undertale undertale_(series) video_games yaoi youfoundta

animated_skeletonbig_dom

1:1 2023 2boys 2d after_deepthroat after_fellatio after_oral animated_skeleton big_penis blue_blush blush bottom_sans brother/brother brothers deepthroat duo ectopenis fellatio fontcest huge_penis incest intraspecies long_penis male male/male male_only monster monster_boy monster_cock monster_penis oral orange_penis papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans_(undertale) sex sibling_incest siblings skeleton solo_focus teeth top_papyrus traditional_media uncensored undead undertale undertale_(series) unseen_male_face veiny_penis video_games yaoi youfoundta

1:1 2023 2boys 2d after_deepthroat after_fellatio after_oral animated_skeleton big_penis blue_blush blush bottom_sans brother/brother brothers deepthroat duo ectopenis fellatio fontcest huge_penis incest intraspecies long_penis male male/male male_only monster monster_boy monster_cock monster_penis oral orange_penis papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans_(undertale) sex sibling_incest siblings skeleton solo_focus teeth top_papyrus traditional_media uncensored undead undertale undertale_(series) unseen_male_face veiny_penis video_games yaoi youfoundta

after_deepthroatafter_fellatio

1:1 1:1_aspect_ratio 1boy 2d animated_skeleton artist_name blue_blush blush bottom_sans clothed clothing digital_media english_text glowing groping hand_on_chest hand_on_face hands humanoid implied_masturbation male male_focus male_only malesub monochrome monster multiple_views orgasm_face partially_clothed partially_colored sans_(undertale) shirtless sigh simple_background singingsans skeleton solo_focus solo_male submissive submissive_male talking_to_viewer text third-party_source topless topless_male trembling undead undertale undertale_(series) video_games

1:1 1:1_aspect_ratio 1boy 2d animated_skeleton artist_name blue_blush blush bottom_sans clothed clothing digital_media english_text glowing groping hand_on_chest hand_on_face hands humanoid implied_masturbation male male_focus male_only malesub monochrome monster multiple_views orgasm_face partially_clothed partially_colored sans_(undertale) shirtless sigh simple_background singingsans skeleton solo_focus solo_male submissive submissive_male talking_to_viewer text third-party_source topless topless_male trembling undead undertale undertale_(series) video_games

animated_skeletonartist_name

!!! 1:1 1:1_aspect_ratio 1boy 2d ahegao animated_skeleton artist_name blue_blush blush bottom_sans digital_media drooling ectotongue exclamation_mark fangs heart-shaped_pupils heart_eyes humanoid male male_ahegao male_focus male_only malesub moan monochrome monster multiple_views open_mouth orgasm_face partially_colored pleasure_face sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tears third-party_source tongue tongue_out trembling undead undertale undertale_(series) video_games white_background

!!! 1:1 1:1_aspect_ratio 1boy 2d ahegao animated_skeleton artist_name blue_blush blush bottom_sans digital_media drooling ectotongue exclamation_mark fangs heart-shaped_pupils heart_eyes humanoid male male_ahegao male_focus male_only malesub moan monochrome monster multiple_views open_mouth orgasm_face partially_colored pleasure_face sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tears third-party_source tongue tongue_out trembling undead undertale undertale_(series) video_games white_background

1boy 2d animated_skeleton artist_name blue_blush blue_tentacles blush bottom_sans bound bound_arms completely_nude completely_nude_male digital_media drooling humanoid male male_focus male_only malesub monochrome monster nude nude_male one_eye_closed partially_colored restrained sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tentacle tentacle_around_arm tentacle_around_arms tentacle_around_leg tentacle_on_male tentacle_sex tentacles tentacles_on_male third-party_source undead undertale undertale_(series) video_game_character video_games

1boy 2d animated_skeleton artist_name blue_blush blue_tentacles blush bottom_sans bound bound_arms completely_nude completely_nude_male digital_media drooling humanoid male male_focus male_only malesub monochrome monster nude nude_male one_eye_closed partially_colored restrained sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tentacle tentacle_around_arm tentacle_around_arms tentacle_around_leg tentacle_on_male tentacle_sex tentacles tentacles_on_male third-party_source undead undertale undertale_(series) video_game_character video_games

animated_skeletonartist_name

1boy 2d animated_skeleton blue_blush blush bottom_sans closed_mouth digital_media drooling english_text fangs humanoid lowres male male_focus male_only malesub monochrome monster partially_colored sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male text third-party_source undead undertale undertale_(series) video_games

1boy 2d animated_skeleton blue_blush blush bottom_sans closed_mouth digital_media drooling english_text fangs humanoid lowres male male_focus male_only malesub monochrome monster partially_colored sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male text third-party_source undead undertale undertale_(series) video_games

animated_skeletonblue_blush

1boy 2d animated_skeleton blue_blush blush bondage bottom_sans bound bound_wrists digital_media disembodied_hand disembodied_hands drooling groping hands hands_over_head humanoid kneel kneeling magic_hands male male_focus malesub monochrome monster pants_down pants_pulled_down partially_colored profanity restrained sans_(undertale) sequential shirt_lift shirt_pulled_up shirt_up simple_background singingsans skeleton solo_focus solo_male submissive submissive_male sweat third-party_source tied_up tied_wrists touching_crotch trembling undead undertale undertale_(series) video_games

1boy 2d animated_skeleton blue_blush blush bondage bottom_sans bound bound_wrists digital_media disembodied_hand disembodied_hands drooling groping hands hands_over_head humanoid kneel kneeling magic_hands male male_focus malesub monochrome monster pants_down pants_pulled_down partially_colored profanity restrained sans_(undertale) sequential shirt_lift shirt_pulled_up shirt_up simple_background singingsans skeleton solo_focus solo_male submissive submissive_male sweat third-party_source tied_up tied_wrists touching_crotch trembling undead undertale undertale_(series) video_games

animated_skeletonblue_blush

1boy 2d animated_skeleton blue_blush blue_tongue blush bottom_sans dark digital_media drooling ectotongue fangs humanoid male male_focus male_only malesub monochrome monster partially_colored pleasure_face sans_(undertale) sequential simple_background singingsans skeleton solo_male submissive submissive_male sweat third-party_source tongue tongue_out trembling undead undertale undertale_(series) upper_body video_games

1boy 2d animated_skeleton blue_blush blue_tongue blush bottom_sans dark digital_media drooling ectotongue fangs humanoid male male_focus male_only malesub monochrome monster partially_colored pleasure_face sans_(undertale) sequential simple_background singingsans skeleton solo_male submissive submissive_male sweat third-party_source tongue tongue_out trembling undead undertale undertale_(series) upper_body video_games

animated_skeletonblue_blush

1boy 2d animated_skeleton blue_blush blue_tongue blush bottom_sans digital_media disembodied_hand drooling ectotongue english_text hand heart-shaped_pupils heart_eyes humanoid male male_focus male_only malesub monochrome monster monster_boy open_mouth panting partially_colored sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male text third-party_source tongue undead undertale undertale_(series) video_game_character video_games

1boy 2d animated_skeleton blue_blush blue_tongue blush bottom_sans digital_media disembodied_hand drooling ectotongue english_text hand heart-shaped_pupils heart_eyes humanoid male male_focus male_only malesub monochrome monster monster_boy open_mouth panting partially_colored sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male text third-party_source tongue undead undertale undertale_(series) video_game_character video_games

animated_skeletonblue_blush

2016 2boys 2d animated_skeleton ass bent_over blue_ass blue_body blue_butt blue_hoodie blue_jacket blush bottom_sans clothed/nude digital_media drooling duo ectobody ectobutt elemental_creature elemental_humanoid fire_elemental from_behind_position glasses glasses_only grillby grillsans heart hood hooded_jacket humanoid interspecies jacket male male/male male_only monster monster_boy orange_body penetration penetration_from_behind sans_(undertale) sex sex_from_behind simple_background skeleton third-party_source top_grillby trembling undead undertale undertale_(series) unknown_artist unknown_artist_signature video_games white_background yaoi

2016 2boys 2d animated_skeleton ass bent_over blue_ass blue_body blue_butt blue_hoodie blue_jacket blush bottom_sans clothed/nude digital_media drooling duo ectobody ectobutt elemental_creature elemental_humanoid fire_elemental from_behind_position glasses glasses_only grillby grillsans heart hood hooded_jacket humanoid interspecies jacket male male/male male_only monster monster_boy orange_body penetration penetration_from_behind sans_(undertale) sex sex_from_behind simple_background skeleton third-party_source top_grillby trembling undead undertale undertale_(series) unknown_artist unknown_artist_signature video_games white_background yaoi

animated_skeletonass

2016 2boys 2d animated_skeleton arms_behind_back artist_name beoteono black_tentacles blue_blush blue_penis blush bodily_fluids bottom_sans buttercupsticks clothed clothing digital_media dominant dominant_male drooling duo ectopenis feet_out_of_frame fluids grabbing_another's_chin grabbing_chin grey_background hand_under_chin hands_behind_back humanoid male male/male male_focus male_only maledom malesub monster one_eye_closed partially_colored penis precum profanity sans_(undertale) sanster simple_background skeleton soul soul_sex submissive submissive_male tentacle tentacle_on_male tentacles tentacles_around_legs tentacles_on_male text top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

2016 2boys 2d animated_skeleton arms_behind_back artist_name beoteono black_tentacles blue_blush blue_penis blush bodily_fluids bottom_sans buttercupsticks clothed clothing digital_media dominant dominant_male drooling duo ectopenis feet_out_of_frame fluids grabbing_another's_chin grabbing_chin grey_background hand_under_chin hands_behind_back humanoid male male/male male_focus male_only maledom malesub monster one_eye_closed partially_colored penis precum profanity sans_(undertale) sanster simple_background skeleton soul soul_sex submissive submissive_male tentacle tentacle_on_male tentacles tentacles_around_legs tentacles_on_male text top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonarms_behind_back

1boy 2016 2d animated_skeleton blue_blush blue_eyes blue_tentacles blue_tongue blush bottom_sans completely_nude completely_nude_male dark_background digital_media disembodied_hand disembodied_hands drooling ectotongue feet_out_of_frame hands heart-shaped_pupils heart_eyes humanoid male male_focus male_only malesub monster nude nude_male penis sans_(undertale) simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_female submissive_male tentacle tentacle_on_male tentacle_sex tentacles_on_male tongue undead undertale undertale_(series) video_game_character video_games wet

1boy 2016 2d animated_skeleton blue_blush blue_eyes blue_tentacles blue_tongue blush bottom_sans completely_nude completely_nude_male dark_background digital_media disembodied_hand disembodied_hands drooling ectotongue feet_out_of_frame hands heart-shaped_pupils heart_eyes humanoid male male_focus male_only malesub monster nude nude_male penis sans_(undertale) simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_female submissive_male tentacle tentacle_on_male tentacle_sex tentacles_on_male tongue undead undertale undertale_(series) video_game_character video_games wet

animated_skeletonblue_blush

1:1 1:1_aspect_ratio 1boy 2016 2d animated_skeleton bedroom blue_blush blue_hoodie blue_jacket blue_penis blush clothed clothing covering_mouth covering_own_mouth dark dark_room digital_media ectopenis fully_clothed glowing glowing_genitalia glowing_penis hand_on_mouth hooded_jacket hoodie humanoid indoors jacket male male_focus male_masturbation male_only masturbation monster one_eye_closed penile_masturbation penis pink_slippers sans_(undertale) sitting skeleton slippers small_penis solo_male spontaneouslynsfw sweat undead undertale undertale_(series) video_game_character video_games

1:1 1:1_aspect_ratio 1boy 2016 2d animated_skeleton bedroom blue_blush blue_hoodie blue_jacket blue_penis blush clothed clothing covering_mouth covering_own_mouth dark dark_room digital_media ectopenis fully_clothed glowing glowing_genitalia glowing_penis hand_on_mouth hooded_jacket hoodie humanoid indoors jacket male male_focus male_masturbation male_only masturbation monster one_eye_closed penile_masturbation penis pink_slippers sans_(undertale) sitting skeleton slippers small_penis solo_male spontaneouslynsfw sweat undead undertale undertale_(series) video_game_character video_games

animated_skeletonbedroom

1boy 2016 2d animated_skeleton begging begging_for_more blue_blush blue_tongue blush bottom_sans clothed clothing dark_background digital_media disembodied_hand disembodied_hands ectotongue english_text fangs groping hands hands_behind_head heart-shaped_pupils humanoid male male_focus malesub moaning monster penis pleasure_face sans_(undertale) shirt_up simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_male sweat text tongue tongue_out undead undertale undertale_(series) visible_breath

1boy 2016 2d animated_skeleton begging begging_for_more blue_blush blue_tongue blush bottom_sans clothed clothing dark_background digital_media disembodied_hand disembodied_hands ectotongue english_text fangs groping hands hands_behind_head heart-shaped_pupils humanoid male male_focus malesub moaning monster penis pleasure_face sans_(undertale) shirt_up simple_background skeleton soul soul_sex spontaneouslynsfw submissive submissive_male sweat text tongue tongue_out undead undertale undertale_(series) visible_breath

animated_skeletonbegging

2021 2boys 2d animated_skeleton blue_blush blue_tongue blush bottom_sans digital_media duo ectotongue fellatio genitals grabbing_penis humanoid licking licking_penis male male/male male_focus male_only monster oral orange_penis penis penis_grab pixiv_id_42770757 sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_male sweat third-party_source tongue undead undertale undertale_(series) unseen_male unseen_male_face upper_body video_games yaoi

2021 2boys 2d animated_skeleton blue_blush blue_tongue blush bottom_sans digital_media duo ectotongue fellatio genitals grabbing_penis humanoid licking licking_penis male male/male male_focus male_only monster oral orange_penis penis penis_grab pixiv_id_42770757 sans_(undertale) sex simple_background skeleton solo_focus submissive submissive_male sweat third-party_source tongue undead undertale undertale_(series) unseen_male unseen_male_face upper_body video_games yaoi

animated_skeletonblue_blush

1:1 1:1_aspect_ratio 2015 2d animated_skeleton anonymous artist_request big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blue_penis bottom_sans collar collar_only digital_media duo ectopenis grabbing_chest hand_on_another's_chest hand_on_another's_head hand_on_chest hand_on_head handjob humanoid male male_focus male_only monster naked nude one_eye_closed penis pet_play petplay sans_(undertale) simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male tears third-party_source trembling undead undertale undertale_(series) video_games yaoi

1:1 1:1_aspect_ratio 2015 2d animated_skeleton anonymous artist_request big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blue_penis bottom_sans collar collar_only digital_media duo ectopenis grabbing_chest hand_on_another's_chest hand_on_another's_head hand_on_chest hand_on_head handjob humanoid male male_focus male_only monster naked nude one_eye_closed penis pet_play petplay sans_(undertale) simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male tears third-party_source trembling undead undertale undertale_(series) video_games yaoi

animated_skeletonanonymous

1boy 2015 2d animated_skeleton ass bad_id bad_tumblr_id blue_background blue_tongue bondage bottom_sans bound bound_legs completely_nude completely_nude_male digital_media ectopenis ectotongue genitals humanoid inactive_account legs_apart male male_focus male_only monster noxiousaberration nude nude_male penis sans_(undertale) simple_background skeleton submissive submissive_male tentacle third-party_source tied_arms tied_up tongue tongue_out undead undertale undertale_(series) video_game_character video_games

1boy 2015 2d animated_skeleton ass bad_id bad_tumblr_id blue_background blue_tongue bondage bottom_sans bound bound_legs completely_nude completely_nude_male digital_media ectopenis ectotongue genitals humanoid inactive_account legs_apart male male_focus male_only monster noxiousaberration nude nude_male penis sans_(undertale) simple_background skeleton submissive submissive_male tentacle third-party_source tied_arms tied_up tongue tongue_out undead undertale undertale_(series) video_game_character video_games

animated_skeletonass

2021 2boys 2d animated_skeleton anonymous anonymous_male bottom_sans clothed clothing cum cum_in_head cum_inside digital_media duo forced grabbing_head hand_on_another's_head hand_on_head head_grab humanoid male male/male male_focus male_only malesub minominoks monochrome monster penetration penis sans_(undertale) sex simple_background skeleton skull_fucking solo_focus submissive submissive_male undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games white_background yaoi

2021 2boys 2d animated_skeleton anonymous anonymous_male bottom_sans clothed clothing cum cum_in_head cum_inside digital_media duo forced grabbing_head hand_on_another's_head hand_on_head head_grab humanoid male male/male male_focus male_only malesub minominoks monochrome monster penetration penis sans_(undertale) sex simple_background skeleton skull_fucking solo_focus submissive submissive_male undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games white_background yaoi

animated_skeletonanonymous

2021 2boys 2d animated_skeleton anonymous anonymous_male bottom_sans clothed clothing cum cum_on_face digital_media duo forced genitals grabbing_head grabbing_penis hand_on_another's_head hand_on_head head_grab humanoid male male/male male_focus male_only malesub minominoks monochrome monster penis penis_grab sans_(undertale) simple_background skeleton solo_focus submissive submissive_male third-party_source undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games white_background yaoi

2021 2boys 2d animated_skeleton anonymous anonymous_male bottom_sans clothed clothing cum cum_on_face digital_media duo forced genitals grabbing_head grabbing_penis hand_on_another's_head hand_on_head head_grab humanoid male male/male male_focus male_only malesub minominoks monochrome monster penis penis_grab sans_(undertale) simple_background skeleton solo_focus submissive submissive_male third-party_source undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games white_background yaoi

animated_skeletonanonymous

2018 2boys 2d animated_skeleton blindfold blindfolded blue_tongue bondage bottom_sans bound bound_arms bound_wrists brother/brother brothers clothed clothed/nude clothing collar comic comic_panel digital_media dominant dominant_male domination duo ectopenis ectotongue english_text fontcest imminent_fellatio imminent_oral incest lowest-of-dirt male male/male male_only maledom monster nude orange_penis papyrus_(undertale) papysans partially_colored penis sans_(undertale) silhouette skeleton submissive text tied_arms tied_up tongue top_papyrus undead undertale undertale_(series) unzipping_pants video_game_character video_games white_background yandere yaoi

2018 2boys 2d animated_skeleton blindfold blindfolded blue_tongue bondage bottom_sans bound bound_arms bound_wrists brother/brother brothers clothed clothed/nude clothing collar comic comic_panel digital_media dominant dominant_male domination duo ectopenis ectotongue english_text fontcest imminent_fellatio imminent_oral incest lowest-of-dirt male male/male male_only maledom monster nude orange_penis papyrus_(undertale) papysans partially_colored penis sans_(undertale) silhouette skeleton submissive text tied_arms tied_up tongue top_papyrus undead undertale undertale_(series) unzipping_pants video_game_character video_games white_background yandere yaoi

animated_skeletonblindfold

2boys 2d anal animated_skeleton bed blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing db-bird digital_media duo ectopenis ectoplasm english_text fontcest from_behind_position humanoid incest intraspecies male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male on_bed orange_blush orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis sans_(undertale) sex sex_from_behind sibling_incest siblings skeleton text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi

2boys 2d anal animated_skeleton bed blush bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers clothed clothing db-bird digital_media duo ectopenis ectoplasm english_text fontcest from_behind_position humanoid incest intraspecies male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy nude nude_male on_bed orange_blush orange_penis papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis sans_(undertale) sex sex_from_behind sibling_incest siblings skeleton text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi

analanimated_skeleton

2boys 2d animated_gif animated_skeleton blue_blush blue_penis blush brother/brother brother_and_brother brothers clothed clothing digital_media drooling dry_humping duo ectopenis ectotongue fontcest genitals gif groping groping_from_behind hand_under_clothes hand_under_shirt handjob humping incest intraspecies kneel male male/male male_only monster monster_boy papyrus_(undertale) papysans partially_colored penis sans_(undertale) shirt_up sibling_incest siblings simple_background skeleton thornisicezins tongue undead undertale undertale_(series) video_game_character video_games white_background yaoi

2boys 2d animated_gif animated_skeleton blue_blush blue_penis blush brother/brother brother_and_brother brothers clothed clothing digital_media drooling dry_humping duo ectopenis ectotongue fontcest genitals gif groping groping_from_behind hand_under_clothes hand_under_shirt handjob humping incest intraspecies kneel male male/male male_only monster monster_boy papyrus_(undertale) papysans partially_colored penis sans_(undertale) shirt_up sibling_incest siblings simple_background skeleton thornisicezins tongue undead undertale undertale_(series) video_game_character video_games white_background yaoi

animated_gifanimated_skeleton

1boy 1cuntboy 2d anger_vein animated_skeleton artist_name ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male boots bottom_sans bottomless bottomless_cuntboy brother/brother brothers clothed clothing cobe-87 cuntboy cuntboysub digital_media dominant dominant_male domination duo ectobody ectobutt ectopussy english_text fontcest hoodie humanoid incest intraspecies jacket larger_male male male/cuntboy maledom monochrome monster monster_boy papyrus_(undertale) papysans partially_colored profanity punishment pussy pussy_juice sans_(undertale) sequential sibling_incest siblings size_difference skeleton small_sub small_sub_big_dom smaller_cuntboy smaller_sub smaller_sub_bigger_dom spank_marks spanking spanking_ass speech_bubble submissive submissive_cuntboy talking_to_another tears text top_papyrus undead undertale undertale_(series) video_games white_background yaoi

1boy 1cuntboy 2d anger_vein animated_skeleton artist_name ass big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male boots bottom_sans bottomless bottomless_cuntboy brother/brother brothers clothed clothing cobe-87 cuntboy cuntboysub digital_media dominant dominant_male domination duo ectobody ectobutt ectopussy english_text fontcest hoodie humanoid incest intraspecies jacket larger_male male male/cuntboy maledom monochrome monster monster_boy papyrus_(undertale) papysans partially_colored profanity punishment pussy pussy_juice sans_(undertale) sequential sibling_incest siblings size_difference skeleton small_sub small_sub_big_dom smaller_cuntboy smaller_sub smaller_sub_bigger_dom spank_marks spanking spanking_ass speech_bubble submissive submissive_cuntboy talking_to_another tears text top_papyrus undead undertale undertale_(series) video_games white_background yaoi

anger_veinanimated_skeleton

1:1 1:1_aspect_ratio 1boy 1cuntboy 2022 2d animated animated_gif animated_skeleton artist_name artist_watermark black_legwear blue_pussy bottom_sans brother brother/brother brothers cuntboy digital_media duo ectopussy empath__life fingering fingering_another fingering_pussy fontcest gif grey_background hand_on_another's_face hand_on_face humanoid incest intraspecies legs_apart legwear male male/male monochrome monster monster_boy nude one_eye_closed papyrus_(undertale) papysans pussy sans_(undertale) sequential sibling_incest siblings simple_background sitting skeleton teeth tel_a_friend top_papyrus undead undertale undertale_(series) video_game_character video_games watermark yaoi

1:1 1:1_aspect_ratio 1boy 1cuntboy 2022 2d animated animated_gif animated_skeleton artist_name artist_watermark black_legwear blue_pussy bottom_sans brother brother/brother brothers cuntboy digital_media duo ectopussy empath__life fingering fingering_another fingering_pussy fontcest gif grey_background hand_on_another's_face hand_on_face humanoid incest intraspecies legs_apart legwear male male/male monochrome monster monster_boy nude one_eye_closed papyrus_(undertale) papysans pussy sans_(undertale) sequential sibling_incest siblings simple_background sitting skeleton teeth tel_a_friend top_papyrus undead undertale undertale_(series) video_game_character video_games watermark yaoi

animatedanimated_gif

1:1 1:1_aspect_ratio 1cuntboy 2023 2d animated_skeleton anonymous blanket blue_blush blue_pussy blush bottom_sans couch cuntboy cuntboy_penetrated digital_media duo ectopussy fingering fingering_another humanoid male monochrome monster on_couch purplebluepen45 pussy sans_(undertale) skeleton undead under_blanket undertale undertale_(series) vaginal yaoi youfoundta

1:1 1:1_aspect_ratio 1cuntboy 2023 2d animated_skeleton anonymous blanket blue_blush blue_pussy blush bottom_sans couch cuntboy cuntboy_penetrated digital_media duo ectopussy fingering fingering_another humanoid male monochrome monster on_couch purplebluepen45 pussy sans_(undertale) skeleton undead under_blanket undertale undertale_(series) vaginal yaoi youfoundta

animated_skeletonanonymous

1:1 1:1_aspect_ratio 1boy 1cuntboy 2023 2d animated_skeleton anonymous anonymous_male bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_clitoris blue_pussy blush bottom_sans clitoris cuntboy cuntboy_focus cuntboy_penetrated dark digital_media duo ectopussy humanoid larger_male larger_penetrating larger_penetrating_smaller male male/cuntboy mating_press monochrome monster partially_colored penetration purplebluepen45 pussy sans_(undertale) sex skeleton smaller_cuntboy smaller_penetrated solo_focus undead undertale undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex yaoi youfoundta

1:1 1:1_aspect_ratio 1boy 1cuntboy 2023 2d animated_skeleton anonymous anonymous_male bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_clitoris blue_pussy blush bottom_sans clitoris cuntboy cuntboy_focus cuntboy_penetrated dark digital_media duo ectopussy humanoid larger_male larger_penetrating larger_penetrating_smaller male male/cuntboy mating_press monochrome monster partially_colored penetration purplebluepen45 pussy sans_(undertale) sex skeleton smaller_cuntboy smaller_penetrated solo_focus undead undertale undertale_(series) unseen_male_face vaginal vaginal_penetration vaginal_sex yaoi youfoundta

animated_skeletonanonymous

1:1 1:1_aspect_ratio 1cuntboy 2023 2d animated_skeleton anonymous anonymous_male blue_blush blue_clitoris blue_pussy blue_tongue blush bottom_sans clitoris crowd crown cuntboy cuntboy_focus cuntboy_penetrated digital_media ectopussy ectotongue faceless faceless_character group humanoid kissing kissing_cheek male male/cuntboy monochrome monster penetration purplebluepen45 pussy sans_(undertale) sex skeleton socks solo_focus tongue tongue_out undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex yaoi youfoundta

1:1 1:1_aspect_ratio 1cuntboy 2023 2d animated_skeleton anonymous anonymous_male blue_blush blue_clitoris blue_pussy blue_tongue blush bottom_sans clitoris crowd crown cuntboy cuntboy_focus cuntboy_penetrated digital_media ectopussy ectotongue faceless faceless_character group humanoid kissing kissing_cheek male male/cuntboy monochrome monster penetration purplebluepen45 pussy sans_(undertale) sex skeleton socks solo_focus tongue tongue_out undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex yaoi youfoundta

animated_skeletonanonymous

2017 2boys 2d animated_skeleton bigger_male blue_blush blue_penis blush bottomless bottomless_male brother/brother brothers clothed clothing digital_media duo ectopenis english_text fontcest genitals gloves hooded_jacket hoodie implied_incest implied_yaoi jacket larger_male looking_at_another looking_at_genitalia looking_at_penis lowest-of-dirt male male/male male_only monster orange_blush orange_penis papyrus_(undertale) papysans partially_colored penis sans_(undertale) skeleton sketch smaller_male sweatdrop text undead undertale undertale_(series) video_game_character video_games white_background

2017 2boys 2d animated_skeleton bigger_male blue_blush blue_penis blush bottomless bottomless_male brother/brother brothers clothed clothing digital_media duo ectopenis english_text fontcest genitals gloves hooded_jacket hoodie implied_incest implied_yaoi jacket larger_male looking_at_another looking_at_genitalia looking_at_penis lowest-of-dirt male male/male male_only monster orange_blush orange_penis papyrus_(undertale) papysans partially_colored penis sans_(undertale) skeleton sketch smaller_male sweatdrop text undead undertale undertale_(series) video_game_character video_games white_background

animated_skeletonbigger_male

1:1 1:1_aspect_ratio 2020 2020s 2boys 2d ? animated_skeleton anonymous_artist blush brother/brother brothers clothed clothing digital_meda duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle reference_image saliva sans_(undertale) skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

1:1 1:1_aspect_ratio 2020 2020s 2boys 2d ? animated_skeleton anonymous_artist blush brother/brother brothers clothed clothing digital_meda duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle reference_image saliva sans_(undertale) skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

?animated_skeleton

2020 2boys 2d ? animated_skeleton blush brother/brother brothers clothed clothing digital_media duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle redrawn saliva sans_(undertale) siblings skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

2020 2boys 2d ? animated_skeleton blush brother/brother brothers clothed clothing digital_media duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle redrawn saliva sans_(undertale) siblings skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

?animated_skeleton

2017 2boys 2d ? animated_skeleton blush brother/brother brothers clothed clothing digital_media duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle saliva sans_(undertale) skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

2017 2boys 2d ? animated_skeleton blush brother/brother brothers clothed clothing digital_media duo eating_food eating_popsicle english_text fontcest food implied_incest implied_yaoi looking_at_another lowest-of-dirt male male/male male_only monster orange_blush orange_popsicle papyrus_(undertale) papysans partially_colored popsicle saliva sans_(undertale) skeleton spoken_question_mark suggestive suggestive_food text undead undertale undertale_(series) upper_body video_game_character video_games white_background

?animated_skeleton

1boy 2019 2d animated_skeleton arms_behind_back completely_nude completely_nude_male digital_media grey_background korean_text legs_apart looking_at_viewer lowest-of-dirt male male_only monster ms_paint nude nude_male oekaki sans_(undertale) simple_background sitting skeleton solid_color_background solo_male text undead undertale undertale_(series) video_game_character video_games

1boy 2019 2d animated_skeleton arms_behind_back completely_nude completely_nude_male digital_media grey_background korean_text legs_apart looking_at_viewer lowest-of-dirt male male_only monster ms_paint nude nude_male oekaki sans_(undertale) simple_background sitting skeleton solid_color_background solo_male text undead undertale undertale_(series) video_game_character video_games

animated_skeletonarms_behind_back

2017 2boys 2d animal animated_skeleton annoying_dog_(undertale) bottom_sans brother/brother brothers canid canine canis clothed clothed_male clothing comic comic_panel comic_sans digital_media dog domestic_dog english_text feral fontcest hoodie incest jacket lowest-of-dirt male male/male male_only monster pants_bulge papyrus_(font) papyrus_(undertale) papysans pinned_down sans_(undertale) skeleton speech_bubble talking_to_another teeth text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi

2017 2boys 2d animal animated_skeleton annoying_dog_(undertale) bottom_sans brother/brother brothers canid canine canis clothed clothed_male clothing comic comic_panel comic_sans digital_media dog domestic_dog english_text feral fontcest hoodie incest jacket lowest-of-dirt male male/male male_only monster pants_bulge papyrus_(font) papyrus_(undertale) papysans pinned_down sans_(undertale) skeleton speech_bubble talking_to_another teeth text top_papyrus undead undertale undertale_(series) video_game_character video_games white_background yaoi

animalanimated_skeleton

2018 2boys 2d animated_skeleton arm_grab big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male biting biting_shoulder black_background bleeding blood blue_blush blue_tongue blush bottom_sans brother/brother brothers chromatic_aberration clothed clothed/nude clothed_male clothing dark_background digital_media dominant dominant_male drooling duo ectotongue edit fangs fontcest glowing glowing_eye incest intraspecies kneel larger_male long_image lowest-of-dirt male male/male male_only maledom malesub monster nude nude_male orange_eye papyrus_(undertale) papysans sans_(undertale) sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male third-party_edit tongue tongue_out top_papyrus undead undertale undertale_(series) undertale_fanfiction video_game_character video_games yaoi

2018 2boys 2d animated_skeleton arm_grab big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male biting biting_shoulder black_background bleeding blood blue_blush blue_tongue blush bottom_sans brother/brother brothers chromatic_aberration clothed clothed/nude clothed_male clothing dark_background digital_media dominant dominant_male drooling duo ectotongue edit fangs fontcest glowing glowing_eye incest intraspecies kneel larger_male long_image lowest-of-dirt male male/male male_only maledom malesub monster nude nude_male orange_eye papyrus_(undertale) papysans sans_(undertale) sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male third-party_edit tongue tongue_out top_papyrus undead undertale undertale_(series) undertale_fanfiction video_game_character video_games yaoi

animated_skeletonarm_grab

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