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breasts female female_only gaster pink_eyes tagme traductor_gang
breasts female female_only gaster pink_eyes tagme traductor_gang
black_background dark_background ectobody female female_sans gaster glasses ink_sans ink_sans_(fan_character) inktale naked nude nude_female rainbow_body rainbow_tongue rectangular_glasses sans sans_au skeleton tagme tongue undertail undertale undertale_au underverse
black_background dark_background ectobody female female_sans gaster glasses ink_sans ink_sans_(fan_character) inktale naked nude nude_female rainbow_body rainbow_tongue rectangular_glasses sans sans_au skeleton tagme tongue undertail undertale undertale_au underverse
2boys animated_skeleton blush brown_hair cum eyes_closed femboy frisk gaster gay girly human male male_frisk male_human male_only mouth_open nude nude_male penis penis_size_difference sitting_on_person skeleton smile undertale undertale_(series) yaoi yellow_body yellow_skin zoober
2boys animated_skeleton blush brown_hair cum eyes_closed femboy frisk gaster gay girly human male male_frisk male_human male_only mouth_open nude nude_male penis penis_size_difference sitting_on_person skeleton smile undertale undertale_(series) yaoi yellow_body yellow_skin zoober
all_fours animated_skeleton arms_tied big_dom_small_sub blindfold blush bone bound collar dialogue doggy_style domination duo english_text father father_and_child father_and_son from_behind_position gaster good_boy hands_behind_back heart humanoid incest leash male male/male male_domination parent parent_and_child pet_praise power_bottom profanity queentexx sans sex size_difference skeleton son submissive submissive_male tentacle text translated undead undertale video_games white_background wingdings yaoi
all_fours animated_skeleton arms_tied big_dom_small_sub blindfold blush bone bound collar dialogue doggy_style domination duo english_text father father_and_child father_and_son from_behind_position gaster good_boy hands_behind_back heart humanoid incest leash male male/male male_domination parent parent_and_child pet_praise power_bottom profanity queentexx sans sex size_difference skeleton son submissive submissive_male tentacle text translated undead undertale video_games white_background wingdings yaoi
2boys blue_penis blush bound_arms bound_legs english_text gaster heart_eyes lightsaber_dick male male_only penis penis_out sans tentacle tentacles text tongue_out undertale wingdings
2boys blue_penis blush bound_arms bound_legs english_text gaster heart_eyes lightsaber_dick male male_only penis penis_out sans tentacle tentacles text tongue_out undertale wingdings
3boys blue_tongue blush double_penetration drooling english_text gaster gay male male_only papyrus penetration purple_tongue sans slime slimy_tentacles tentacle text threesome tongue_out undertale wingdings yaoi
3boys blue_tongue blush double_penetration drooling english_text gaster gay male male_only papyrus penetration purple_tongue sans slime slimy_tentacles tentacle text threesome tongue_out undertale wingdings yaoi
1girls bald_female big_breasts black_and_white digital_media_(artwork) female female_only gaster genderswap_(mtf) monster_girl nightmare_waifu pixel_art rule_63 skeleton sprite sprite_art the_absolute undertale video_game_character
1girls bald_female big_breasts black_and_white digital_media_(artwork) female female_only gaster genderswap_(mtf) monster_girl nightmare_waifu pixel_art rule_63 skeleton sprite sprite_art the_absolute undertale video_game_character
ahe_gao blue_tongue blush crying_with_eyes_open disembodied_hand disembodied_hands dominant_pov english_text fangs gaster hands_behind_head male male_only moan pleasure_face pov sans solo_focus text tongue tongue_out undertale
ahe_gao blue_tongue blush crying_with_eyes_open disembodied_hand disembodied_hands dominant_pov english_text fangs gaster hands_behind_head male male_only moan pleasure_face pov sans solo_focus text tongue tongue_out undertale
1boy 1male 1monster anthro black_clothing black_tentacles clothed clothing coffee cum cumming cumshot cup daddy dick english_text gaster gay gay_sex hand_on_head jerking jerking_off jerkingoff lizheru lizherubones love male male_focus male_only masturbating masturbation penis sex skeleton sofa solo solo_focus solo_male source_request tagme tentacle tentacle_masturbation tentacle_on_male tentacle_sex tentacles text undertale white_skin yaoi
1boy 1male 1monster anthro black_clothing black_tentacles clothed clothing coffee cum cumming cumshot cup daddy dick english_text gaster gay gay_sex hand_on_head jerking jerking_off jerkingoff lizheru lizherubones love male male_focus male_only masturbating masturbation penis sex skeleton sofa solo solo_focus solo_male source_request tagme tentacle tentacle_masturbation tentacle_on_male tentacle_sex tentacles text undertale white_skin yaoi
7boys bukkake burgerpants cum cum_in_eye cum_on_face gaster lightsaber_dick oc original_character papyrus sans sigma_stare
7boys bukkake burgerpants cum cum_in_eye cum_on_face gaster lightsaber_dick oc original_character papyrus sans sigma_stare
1boy 1boy1girl 1girls frisk gaster tagme undertale
1boy 1boy1girl 1girls frisk gaster tagme undertale
all_fours anthro apologizing ass audience being_watched canid canine canis collar completely_nude crocodile crocodilian crocodylid dialogue dogamy dogaressa doggo_(undertale) domestic_cat domestic_dog dominant_male domination elemental_creature english_text feet felid feline felis female female_focus fire fire_creature first_person_view fish fish_girl fish_humanoid flowey_the_flower frisk from_behind_position fucked_silly gaster genitals gills good_girl greyscale group haaru hair heart hi_res human human_on_anthro humiliation interspecies leash leash_pull lesser_dog long_hair male male_domination male_on_anthro mammal marine mettaton monochrome nude on_stage penetration penis plant ponytail pov public public_exposure public_humiliation public_rape public_sex reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie sex sex_slave shoulders straight submissive_female temmie_(undertale) text undertale undyne video_games
all_fours anthro apologizing ass audience being_watched canid canine canis collar completely_nude crocodile crocodilian crocodylid dialogue dogamy dogaressa doggo_(undertale) domestic_cat domestic_dog dominant_male domination elemental_creature english_text feet felid feline felis female female_focus fire fire_creature first_person_view fish fish_girl fish_humanoid flowey_the_flower frisk from_behind_position fucked_silly gaster genitals gills good_girl greyscale group haaru hair heart hi_res human human_on_anthro humiliation interspecies leash leash_pull lesser_dog long_hair male male_domination male_on_anthro mammal marine mettaton monochrome nude on_stage penetration penis plant ponytail pov public public_exposure public_humiliation public_rape public_sex reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie sex sex_slave shoulders straight submissive_female temmie_(undertale) text undertale undyne video_games
all_fours anthro ass audience bratty_(undertale) canid canine canis catty_(undertale) collar crocodile crocodilian crocodylid dogamy dogaressa doggo_(undertale) domestic_cat domestic_dog domination elemental_creature feet felid feline felis female fire fire_creature first_person_view fish flowey_the_flower fuku_fire gaster genitals gills greater_dog greyscale group haaru hair hi_res hips human imminent_sex interspecies leash leash_and_collar lesser_dog long_hair male male_domination mammal marine mettaton monochrome nude on_stage penis plant ponytail public public_humiliation public_nudity public_rape reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie shyren soles submissive submissive_female temmie_(undertale) thighs undertale undyne video_games
all_fours anthro ass audience bratty_(undertale) canid canine canis catty_(undertale) collar crocodile crocodilian crocodylid dogamy dogaressa doggo_(undertale) domestic_cat domestic_dog domination elemental_creature feet felid feline felis female fire fire_creature first_person_view fish flowey_the_flower fuku_fire gaster genitals gills greater_dog greyscale group haaru hair hi_res hips human imminent_sex interspecies leash leash_and_collar lesser_dog long_hair male male_domination mammal marine mettaton monochrome nude on_stage penis plant ponytail public public_humiliation public_nudity public_rape reptile royal_guard_(undertale) royal_guard_1 royal_guard_2 scalie shyren soles submissive submissive_female temmie_(undertale) thighs undertale undyne video_games
1girls gaster rule_63 smiling_at_viewer tagme tentacle thick undertale
1girls gaster rule_63 smiling_at_viewer tagme tentacle thick undertale
breasts chara clickertale crossover female gaster looking_at_viewer nipples presenting_hindquarters pubic_hair pussy red_eyes tagme tagme_(character) undertale
breasts chara clickertale crossover female gaster looking_at_viewer nipples presenting_hindquarters pubic_hair pussy red_eyes tagme tagme_(character) undertale
1:1 gaster lizheru male male_only penis solo undertale video_games
1:1 gaster lizheru male male_only penis solo undertale video_games
1:1 gaster lizheru male male_only masturbation penis solo undertale video_games
1:1 gaster lizheru male male_only masturbation penis solo undertale video_games
aged_up belly breasts brown_hair clothing cupcake992 dark_skin female fingering frisk gaster ghost goo_(disambiguation) hair human legwear mammal navel nipples overweight overweight_female pussy spirit stockings tongue tongue_out undertale video_games
aged_up belly breasts brown_hair clothing cupcake992 dark_skin female fingering frisk gaster ghost goo_(disambiguation) hair human legwear mammal navel nipples overweight overweight_female pussy spirit stockings tongue tongue_out undertale video_games
1boy 4_fingers abs ahe_gao balls bara big_balls big_pecs big_penis big_tongue black_eyes blush cum eyes four_pack gaster jerking large_penis male male_only masturbation muscle muscles paper_drawing pecs precum purple_blush purple_tongue redeyedgazer shoulders simple_background sitting sketch spread_legs sweat sweating thick_arms thick_legs thick_penis thick_thighs tongue tongue_out undertale white_background white_sclera white_skin yaoi
1boy 4_fingers abs ahe_gao balls bara big_balls big_pecs big_penis big_tongue black_eyes blush cum eyes four_pack gaster jerking large_penis male male_only masturbation muscle muscles paper_drawing pecs precum purple_blush purple_tongue redeyedgazer shoulders simple_background sitting sketch spread_legs sweat sweating thick_arms thick_legs thick_penis thick_thighs tongue tongue_out undertale white_background white_sclera white_skin yaoi
ass big_ass big_butt blush bubble_ass bubble_butt butt_up fat_ass fat_butt gaster hugging_pillow laying_on_stomach male_only muscular on_bed redeyedgazer round_ass round_butt shirtless smiling thick_ass thick_butt thick_thighs topless undertale underwear
ass big_ass big_butt blush bubble_ass bubble_butt butt_up fat_ass fat_butt gaster hugging_pillow laying_on_stomach male_only muscular on_bed redeyedgazer round_ass round_butt shirtless smiling thick_ass thick_butt thick_thighs topless undertale underwear
1:1 3boys animated_skeleton big_penis blush blushing bodily_fluids bone cock collaborative_handjob cum cum_on_face cum_on_penis cumming cumshot dick gaster gay gay_sex genital_fluids group handjob huge_cock humanoid humanoid_penis incest licking lizheru lizherubones male male/male male/male/male male_focus male_only masturbating masturbation oral oral_sex papyrus penile penis penis_lick sans semi_incest sex skeleton skeletons smile tongue tongue_out undead undertale vein veiny_penis video_games yaoi
1:1 3boys animated_skeleton big_penis blush blushing bodily_fluids bone cock collaborative_handjob cum cum_on_face cum_on_penis cumming cumshot dick gaster gay gay_sex genital_fluids group handjob huge_cock humanoid humanoid_penis incest licking lizheru lizherubones male male/male male/male/male male_focus male_only masturbating masturbation oral oral_sex papyrus penile penis penis_lick sans semi_incest sex skeleton skeletons smile tongue tongue_out undead undertale vein veiny_penis video_games yaoi
! ... 1:1 anal anal_penetration anal_sex animated_skeleton big_dom_small_sub bigger_dom bigger_penetrating_smaller blue_penis bone clothing duo english_text faceless_male from_behind gaster gay humanoid humanoid_penis implied_incest larger_dom larger_penetrating larger_penetrating_smaller lizheru lizherubones looking_back looking_behind male male/male male_only pants_around_one_leg penetration penis sans sex skeleton smaller_penetrated smaller_sub testicles text text_bubble undead undertale video_games yaoi
! ... 1:1 anal anal_penetration anal_sex animated_skeleton big_dom_small_sub bigger_dom bigger_penetrating_smaller blue_penis bone clothing duo english_text faceless_male from_behind gaster gay humanoid humanoid_penis implied_incest larger_dom larger_penetrating larger_penetrating_smaller lizheru lizherubones looking_back looking_behind male male/male male_only pants_around_one_leg penetration penis sans sex skeleton smaller_penetrated smaller_sub testicles text text_bubble undead undertale video_games yaoi
... 1:1 animated_skeleton bone clothing duo gaster heart humanoid humanoid_penis incest lizheru lizherubones male male/male papster papyrus penis simple_background skeleton text undead undertale video_games white_background
... 1:1 animated_skeleton bone clothing duo gaster heart humanoid humanoid_penis incest lizheru lizherubones male male/male papster papyrus penis simple_background skeleton text undead undertale video_games white_background
animated_skeleton blue_eyes blue_tongue bone chair clothing computer duo fellatio gaster gay hand_on_head hi_res humanoid humanoid_penis incest keyboard licking_penis lizheru lizherubones male male_only oral penis sans skeleton sucking_penis tongue undead undertale video_games yaoi
animated_skeleton blue_eyes blue_tongue bone chair clothing computer duo fellatio gaster gay hand_on_head hi_res humanoid humanoid_penis incest keyboard licking_penis lizheru lizherubones male male_only oral penis sans skeleton sucking_penis tongue undead undertale video_games yaoi
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cum gaster lizherubones male male_only masturbation penis solo tongue undertale yaoi
<3_eyes ahe_gao all_fours anal anal_sex anvil_position black_sclera blush bruised clothing cum cum_in_ass cum_inside cum_on_face deltarune disembodied_hand doggy_style double_anal double_penetration erection from_behind_position gaster grin heart holding_chin humanoid imp jevil_(deltarune) kuruko legs_up looking_pleasured male male_only mostly_clothed open_mouth pants penetration penis sex sharp_teeth simple_background smile sweat sweatdrop teeth tentacle tongue tongue_out torn_clothing torn_pants undertale video_games white_background yaoi yellow_pupils yellow_teeth
<3_eyes ahe_gao all_fours anal anal_sex anvil_position black_sclera blush bruised clothing cum cum_in_ass cum_inside cum_on_face deltarune disembodied_hand doggy_style double_anal double_penetration erection from_behind_position gaster grin heart holding_chin humanoid imp jevil_(deltarune) kuruko legs_up looking_pleasured male male_only mostly_clothed open_mouth pants penetration penis sex sharp_teeth simple_background smile sweat sweatdrop teeth tentacle tongue tongue_out torn_clothing torn_pants undertale video_games white_background yaoi yellow_pupils yellow_teeth
black_sclera blush clothed clothed_sex clothing crossover cum cum_in_mouth cum_inside cum_splatter darkner deltarune disembodied_hand drooling duo erection fellatio gaster gloves holding_tail humanoid imp jevil_(deltarune) kuruko male male_only oral orgasm penis questionable_consent saliva sex simple_background tentacle tentacle_in_mouth tentacles_everywhere undertale video_games white_background yaoi
black_sclera blush clothed clothed_sex clothing crossover cum cum_in_mouth cum_inside cum_splatter darkner deltarune disembodied_hand drooling duo erection fellatio gaster gloves holding_tail humanoid imp jevil_(deltarune) kuruko male male_only oral orgasm penis questionable_consent saliva sex simple_background tentacle tentacle_in_mouth tentacles_everywhere undertale video_games white_background yaoi
1girls areolae arms_behind_back belly belly_bulge big_breasts breasts chubby dialogue dkdevil female female_only gaster hourglass hourglass_figure huge_ass huge_breasts humanoid large_breasts lingerie rule_63 skindentation stockings text thick_thighs thighhighs underboob undertale wide_hips
1girls areolae arms_behind_back belly belly_bulge big_breasts breasts chubby dialogue dkdevil female female_only gaster hourglass hourglass_figure huge_ass huge_breasts humanoid large_breasts lingerie rule_63 skindentation stockings text thick_thighs thighhighs underboob undertale wide_hips
anthro artist_request blue_penis facial_scar gaster glowing_penis holding_penis male male_only penis scar skeleton smile smirk solo sweater tagme turtleneck undertale
anthro artist_request blue_penis facial_scar gaster glowing_penis holding_penis male male_only penis scar skeleton smile smirk solo sweater tagme turtleneck undertale
1futa animated_skeleton bone breasts erection futa_only futanari gaster heart highres humanoid humanoid_penis intersex ksuriuri monochrome monster penis skeleton smile solo undead undertale
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anal anthro anthro_penetrating asgore_dreemurr boss_monster caprine duo gaster gay humanoid humanoid_on_anthro male male/male male_only male_penetrating_male mammal sex simple_background tomis-jb undertale video_games yaoi
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1boy 1girls anus ass barefoot big_breasts blood blush bondage bound breasts busty canime cannibalism curvy cut_open dat_ass feast feet female female_frisk fork frisk gag gagged gaster guro human imminent_death knife legs_up male monochrome nipples nude nudity pussy roast skeleton tied_up undertale unknown_artist vulva
2017 4_fingers ? animated_skeleton anthro ass bed blush bone boss_monster breast_squish breasts caprine closed_eyes duo_focus english_text female gaster goat group horn humanoid male mammal naked nude on_bed penis plantigrade restricted_palette sans simple_background skeleton smile speech_bubble straight sweat text toriel undead undertale video_games white_background 再見竜宮
2017 4_fingers ? animated_skeleton anthro ass bed blush bone boss_monster breast_squish breasts caprine closed_eyes duo_focus english_text female gaster goat group horn humanoid male mammal naked nude on_bed penis plantigrade restricted_palette sans simple_background skeleton smile speech_bubble straight sweat text toriel undead undertale video_games white_background 再見竜宮
2boys anal androgynous android artist_request blush dialogue duo forced gaster high_heel_boots interspecies looking_back machine male male_only mettaton mettaton_ex penis rape restrained robot robot_humanoid sex speech_bubble tagme tentacle tentacle_rape undertale yaoi
2boys anal androgynous android artist_request blush dialogue duo forced gaster high_heel_boots interspecies looking_back machine male male_only mettaton mettaton_ex penis rape restrained robot robot_humanoid sex speech_bubble tagme tentacle tentacle_rape undertale yaoi
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