alternate_universe angry animated_skeleton bone brother_(lore) brothers_(lore) comic dialogue english_text male monster not_furry oolay-tiger papyrus_(undertale) sans_(undertale) sibling_(lore) skeleton text undead underfell undertale undertale_(series) worried
alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) comic dialogue english_text incest_(lore) male male/male monster not_furry oolay-tiger papyrus_(underfell) papyrus_(undertale) sans_(underfell) sans_(undertale) sex sibling_(lore) skeleton text undead underfell undertale undertale_(series)
against_surface against_wall ahegao alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) comic dialogue english_text heart_eyes heart_symbol incest_(lore) looking_pleasured male male/male not_furry one_eye_closed oolay-tiger papyrus_(underfell) penetration profanity sans_(underfell) sans_(undertale) sex sibling_(lore) skeleton text tongue tongue_out undead underfell undertale undertale_(series)
alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) comic dialogue english_text incest_(lore) male male/male monster not_furry oolay-tiger papyrus_(undertale) penetration profanity sans_(undertale) sex sibling_(lore) skeleton text undead underfell undertale undertale_(series)
alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) comic dialogue english_text incest_(lore) low_res male male/male not_furry oolay-tiger papyrus_(undertale) sans_(undertale) sex sibling_(lore) simple_background skeleton text undead underfell undertale undertale_(series) white_background
alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) comic dialogue duo english_text erection frottage genitals humanoid_genitalia humanoid_penis incest_(lore) male male/male masturbation monster not_furry oolay-tiger papyrus_(undertale) penetration penile penile_masturbation penis penises_touching rubbing sans_(undertale) sex sibling_(lore) skeleton text undead underfell undertale undertale_(series)
absurd_res alternate_universe angry animated_skeleton bone boss_monster_(undertale) bovid cape caprine clothed clothing comic crown english_text eyes_closed female flower gold_(metal) gold_tooth happy headgear hi_res hoodie horn laugh long_image male mammal marl-arts plant robe sans_(underfell) sans_(underswap) sans_(undertale) sharp_teeth skeleton sleeping smile tall_image teeth text topwear toriel toriel_(underfell) toriel_(underswap) undead underfell underswap undertale undertale_(series)
1:1 alternate_universe animated_skeleton blush bone cigarette clothed clothing group implied_incest incest_(lore) lizheru looking_at_viewer male male/male not_furry papyrus_(underswap) red_eyes sans_(underfell) sans_(underswap) skeleton smile suggestive tongue undead underfell underswap undertale undertale_(series)
1:1 2016 alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) cigarette clothed clothed_sex clothing collaborative collaborative_fellatio collaborative_oral collaborative_sex erection fellatio furniture genitals glowing glowing_genitalia glowing_penis group humanoid_genitalia humanoid_penis incest_(lore) licking lizheru looking_at_viewer male male/male monster not_furry oral papyrus_(underswap) penile penis penis_lick red_eyes sans_(underfell) sans_(underswap) sex sibling_(lore) skeleton smile smoking sofa tongue tongue_out undead underfell underswap undertale undertale_(series)
alterfell alternate_universe altertale anthro barefoot black_eyeshadow boss_monster_(undertale) bovid breasts caprine cleavage clothed clothing eyeshadow feet female friisans fur hoodie horn looking_at_viewer makeup mammal red_eyes shortstack simple_background solo topwear toriel toriel_(alterfell) underfell undertale undertale_(series) white_background white_body white_fur yellow_sclera
absurd_res alternate_universe animated_skeleton avian bird bone chicken clothed clothing comic duo english_text galliform gold_(metal) gold_tooth hi_res hoodie humor male marl-arts not_furry phasianid sans_(underfell) sans_(undertale) sharp_teeth skeleton source_request teeth text topwear undead underfell undertale undertale_(series)
alternate_universe anthro boss_monster_(undertale) bovid caprine clothing conditional_dnp duo fangs female hand_holding mammal mature_anthro mature_female simple_background sketch skoon slightly_chubby square_crossover teeth toriel toriel_(underfell) underfell undertale undertale_(series)
alpha_channel alternate_universe animated_skeleton bodily_fluids bone clothed clothing gold_(metal) gold_tooth hoodie humanoid male marl-arts not_furry sans_(underfell) sharp_teeth skeleton solo sweat teeth topwear undead underfell undertale undertale_(series)
2016 alternate_universe anthro blood bodily_fluids boss_monster_(undertale) bovid caprine clothed clothing dark fangs female fur hnai horn insane mammal signature solo teeth toriel_(underfell) underfell undertale undertale_(series) villainous white_body white_fur white_horn
1:1 accessory alternate_universe animated animated_gif canid canine captinredstone clothing eyewear felid feral fur hair low_res mammal monocle necktie shaking short_playtime simple_background solo suit tem temmie_(undertale) underfell undertale undertale_(series) white_background
alpha_channel alternate_universe angry animated_skeleton bone clothed clothing food footwear holding_object humanoid itsrainingpotato_(artist) looking_at_viewer low_res mustard not_furry red_eyes sans_(underfell) shoes simple_background skeleton solo standing transparent_background undead underfell undertale undertale_(series)
2016 alternate_universe balls blush digital_media_(artwork) duo english_text erection fan_character femboy gaiki genitals hair heart_symbol hi_res humanoid machine male male/male mettaton mettaton_(underfell) mettaton_ex_(underfell) mettaton_neo multi_arm multi_eye multi_genitalia multi_limb multi_penis not_furry penis robot selfcest sex sharp_teeth simple_background smile square_crossover teeth text underfell undertale undertale_(series) white_background
2016 alpha_channel alternate_universe digital_media_(artwork) fan_character femboy gaiki hair heart_symbol humanoid machine male mettaton_(underfell) mettaton_ex_(underfell) multi_arm multi_eye multi_limb not_furry robot sharp_teeth solo teeth underfell undertale undertale_(series)
3:5 alternate_universe animated_skeleton blue_eyes blush bone caught_in_the_act clothing comic dialogue english_text male not_furry nsfwshamecave papyrus_(underfell) sans_(underswap) skeleton text undead underfell underswap undertale undertale_(series)
3:5 alternate_universe animated_skeleton blue_eyes blush bodily_fluids bone clothing comic dialogue english_text male not_furry nsfwshamecave papyrus_(underfell) sans_(underswap) skeleton sweat text undead underfell underswap undertale undertale_(series)
3:5 alternate_universe animated_skeleton blue_eyes blush bodily_fluids bone caught_in_the_act collar comic dialogue duo ellipsis english_text heart_symbol interrobang leash male male/male mistaken_identity multiple_scenes not_furry nsfwshamecave papyrus_(underfell) red_eyes sans_(underfell) sans_(underswap) skeleton submissive submissive_male suggestive surprised sweat text undead underfell underswap undertale undertale_(series)
1:1 2_frame_animation alternate_universe angry animated animated_gif animated_skeleton blue_eyes blush bone brother_(lore) brothers_(lore) clothed clothed_sex clothing collar confusion dominant dominant_male ellipsis erection fellatio genitals group heart_symbol humanoid humanoid_on_humanoid humanoid_penetrated humanoid_penetrating humanoid_penetrating_humanoid incest_(lore) leash loop male male/male male_penetrated male_penetrating male_penetrating_male mistaken_identity not_furry nsfwshamecave oral oral_only oral_penetration papyrus_(underfell) penetration penile penile_penetration penis penis_in_mouth question_mark sans_(underfell) sans_(underswap) sex short_playtime sibling_(lore) skeleton slideshow submissive submissive_male undead underfell underswap undertale undertale_(series)
alternate_universe anal anal_penetration animated_skeleton blush bodily_fluids bone breath clothed clothed_sex clothing cowboy digital_media_(artwork) duo erection genital_fluids genitals hi_res magic magic_flesh magic_penis male male/male male_penetrated male_penetrating male_penetrating_male not_furry nsfwshamecave oral panting papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) penetration penis precum pseudo_incest_(lore) sans_(underswap) sex skeleton sweat tongue tongue_out undead underfell underswap undertale undertale_(series)
alien alien_humanoid alternate_universe animated_skeleton army_(steven_universe) black_sclera bone cartoon_network ckaitlyn clothed clothing crossover dancetale doc_(steven_universe) eyeball_(steven_universe) fully_clothed gans_(echotale) gem_(species) gloves group handwear humanoid inktale kerchief leggy_(steven_universe) mafiatale navy_(steven_universe) not_furry plant rock ruby_(gem_species) ruby_(steven_universe) sans_(mafiatale) sans_(underfell) sans_(underswap) sans_(undertale) signature skeleton snow star steven_universe sweater topwear tree undead underfell underswap undertale undertale_(series)
alternate_universe humanoid korean_text male mettaton_(underfell) mettaton_ex_(underfell) not_furry pink_eyes red_eyes solo sungho text underfell undertale undertale_(series)
1:1 alternate_universe ambiguous_penetration anthro asgore_(underfell) bodily_fluids boss_monster_(undertale) bovid breasts caprine drawg_t duo facial_hair female female_penetrated horn japanese_text male male/female male_penetrating male_penetrating_female mammal mature_anthro mature_female mature_male nude open_mouth orgasm penetration sex simple_background sweat text toriel_(underfell) underfell undertale undertale_(series)
2016 alternate_universe animated_skeleton blush bone clothing erection genitals glowing glowing_genitalia glowing_penis hi_res humanoid_genitalia humanoid_penis magic magic_penis male masturbation not_furry orange_penis papyrus_(underfell) penile penile_masturbation penis skeleton solo soul soul_lick undead underfell undertale undertale_(series) unknown_artist
2016 alcohol alternate_universe animated_skeleton beverage bone clothed clothing comic container cup cutlery dialogue english_text food fork gloves handwear hoodie kitchen_utensils min-play_(artist) not_furry papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) pasta scar scarf skeleton spaghetti speech_bubble text tools topwear undead underfell underswap undertale undertale_(series)
2016 alcohol alternate_universe animated_skeleton beverage bone clothed clothing comic container cup cutlery dialogue english_text food fork gloves handwear hoodie kitchen_utensils min-play_(artist) not_furry papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) pasta scar scarf skeleton spaghetti speech_bubble text tools topwear undead underfell underswap undertale undertale_(series)
alternate_universe animated_skeleton bone clothing comic dialogue english_text hoodie min-play_(artist) not_furry papyrus_(underfell) papyrus_(underswap) scar scarf skeleton text topwear undead underfell underswap undertale undertale_(series)
2016 alternate_universe animated animated_comic animated_gif animated_skeleton bone bottomwear clothed clothing comic dialogue english_text hoodie humor min-play_(artist) not_furry pants papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) pun scarf short_playtime skeleton speech_bubble text topwear undead underfell underswap undertale undertale_(series)
5_fingers abs alternate_universe anthro aquatic belt blue_body blue_scales bottomwear cel_shading clothing ear_fins eye_patch eyewear female fin fingers fish front_view gloves hair handwear hi_res holding_object holding_weapon long_hair looking_at_viewer melee_weapon midriff pants polearm red_eyes red_hair scales shaded sharp_teeth shirt sl4ughtermelon smile solo spear teeth topwear torn_clothing underfell undertale undertale_(series) undyne_(underfell) weapon yellow_sclera
alpha_channel alternate_universe animated_skeleton bone humanoid male not_furry papyrus_(underfell) skeleton smeme solo undead underfell undertale undertale_(series)
16:10 alternate_universe animated_skeleton blush bodily_fluids bone clothed clothed_sex clothing colored_cum cum cum_on_face cum_on_hand cum_on_tongue english_text genital_fluids glowing glowing_eyes group heart_symbol male male/male not_furry nsfwshamecave sans_(underfell) sans_(underlust) sans_(underswap) sans_(undertale) sex skeleton text tongue tongue_out undead underfell underlust underswap undertale undertale_(series) unusual_bodily_fluids unusual_cum unusual_genital_fluids widescreen
1:1 alternate_universe animated_skeleton bone cellphone character_cipher clothed clothing dialogue duo earbuds electronics gaster headphones keno9988 monochrome not_furry phone sans_(underfell) skeleton text translated undead underfell undertale undertale_(series) wingdings_text
2015 alternate_universe ambiguous_gender animated_skeleton blush bodily_fluids bone clothed clothing coat digital_media_(artwork) duo footwear heart_symbol hug human jacket mamaito mammal not_furry protagonist_(underfell) sans_(underfell) shoes skeleton sweat teeth topwear undead underfell undertale undertale_(series)
absurd_res alternate_universe breasts crossgender demon female glistening hair hi_res humanoid lnemdave mammal membrane_(anatomy) membranous_wings mettaton mettaton_(underfell) mettaton_ex_(underfell) not_furry simple_background solo standing underfell undertale undertale_(series) wings
alternate_universe ambiguous_gender animated_skeleton black_sclera bone bottomwear charmander clothing crossover fire flaming_tail footwear generation_1_pokemon gold_(metal) gold_tooth hi_res jacket keksbela nintendo pokemon pokemon_(species) red_eyes sans_(underfell) shoes shorts simple_background skeleton smile sneakers solo sweater tail topwear undead underfell undertale undertale_(series) watermark white_background
5:4 alkipunch alternate_universe animated_skeleton bone erection genitals hi_res humanoid male not_furry penis sans_(underfell) skeleton solo undead underfell undertale undertale_(series)
2015 alternate_universe animal_humanoid arachnid arachnid_humanoid arthropod arthropod_humanoid bag boots bow_(feature) bow_tie cigar clothed clothing duo female footwear front_view fully_clothed grey_hair gun hair hand_on_hip handgun holding_gun holding_object holding_ranged_weapon holding_weapon humanoid knife mafiatale muffet multi_arm multi_eye multi_limb multi_wielding noodle_number noodlenumber open_mouth open_smile pigtails ranged_weapon revolver shoes size_difference smile smoke smoking spider spider_humanoid standing suspenders thin_calves thin_legs thin_thighs underfell undertale undertale_(series) weapon
2015 alternate_universe animal_humanoid arachnid arachnid_humanoid arthropod arthropod_humanoid black_background cigar digital_media_(artwork) female gun handgun holding_gun holding_object holding_ranged_weapon holding_weapon humanoid knife low_res monochrome muffet multi_eye multi_limb multi_wielding noodlenumber pigtails ranged_weapon revolver simple_background solo spider spider_humanoid thumbnail underfell undertale undertale_(series) weapon
1:1 alternate_universe anthro boss_monster_(undertale) bovid caprine clothing dialogue english_text fangs horn long_ears mammal pupils red_pupils robe signature sleepsmcartist smile solo teeth text tongue toriel_(underfell) underfell undertale undertale_(series) watermark yellow_eyes
alternate_universe ankk anthro big_breasts blood blush bodily_fluids boss_monster_(undertale) bovid breasts caprine cowgirl_position cum cum_inside duo female female_on_top frisk_(undertale) from_front_position fur genital_fluids genitals heart_eyes heart_symbol hi_res horn human japanese_text lactating larger_female long_ears male male/female male_on_bottom mammal mature_anthro mature_female milk nipples on_bottom on_top penis red_eyes sex size_difference smaller_male straddling text toriel_(underfell) translated underfell undertale undertale_(series) vulva white_body white_fur yellow_sclera
alternate_universe ambiguous_gender blood blue_eyes blush bodily_fluids bottomwear brown_hair chara_(undertale) child clothed clothing crying elemental_creature eyes_closed flora_fauna flower flowey_the_flower fully_clothed glare group hair human knife looking_at_viewer male mammal not_furry open_mouth pants pattern_clothing pattern_topwear plant poririring protagonist_(underfell) protecting scared simple_background striped_clothing striped_topwear stripes sweater tears topwear underfell undertale undertale_(series) weapon white_background young
1:2 alternate_universe animated_skeleton blush bone clothing heart_symbol humanoid incest_(lore) kissing kissing_neck male not_furry nsfwshamecave papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) question_mark sans_(underfell) sans_(underswap) sans_(undertale) skeleton surprised undead underfell underswap undertale undertale_(series)
2016 4_fingers 5_fingers abstract_background alternate_universe animated_skeleton anthro belt black_sclera blush bone boss_monster_(undertale) bottomwear bovid breasts caprine cigar clothed clothing duo eyeshadow fangs female fingers flower fur half-closed_eyes heart_symbol hi_res horn jacket larger_female makeup male mammal markings mature_anthro mature_female mole_(marking) narrowed_eyes pants plant red_eyes robe sans_(underfell) signature size_difference skeleton smaller_male smile smoking snowystoat sweater teeth topwear toriel_(underfell) turtleneck undead underfell undertale undertale_(series) white_body white_fur yellow_sclera
4:3 age_difference alternate_universe anal anal_penetration anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro armlet asgore_(underfell) asriel_dreemurr_(god_form) beard blush bodily_fluids boss_monster_(undertale) bovid caprine crying dialogue dominant dominant_male duo facial_hair father_(lore) father_and_child_(lore) father_and_son_(lore) forced from_front_position horn incest_(lore) japanese_text long_ears lying male male/male male_penetrated male_penetrating male_penetrating_male male_rape male_raped male_raping_male mammal mating_press mature_male missionary_position monochrome mustache older_male older_penetrated on_back parent_(lore) parent_and_child_(lore) parent_and_son_(lore) penetration penile penile_penetration pyon_nyan rape sex son_(lore) son_dom_father_sub son_penetrating_father submissive submissive_male tears text translation_check underfell undertale undertale_(series) younger_male
alphys_(underfell) alternate_universe anthro eyewear female glasses low_res reptile scalie simple_background solo underfell undertale undertale_(series) unknown_artist
alternate_universe anal anal_penetration animated_skeleton blush bodily_fluids bone clothed clothed_sex clothing cum duo genital_fluids hands_behind_back heart_eyes heart_symbol male male/male male_penetrated male_penetrating male_penetrating_male not_furry penetration rough_sex saliva sans_(underfell) sans_(undertale) selfcest sex skeleton square_crossover sweat tears undead underfell undertale undertale_(series) unusual_bodily_fluids unusual_cum unusual_genital_fluids
2016 alpha_channel alternate_universe anthro areola bdsm bear big_breasts bodily_fluids bondage boss_monster_(undertale) bound bovid breasts brown_eyes cape caprine clitoris clothing consentacles cross cross_necklace crossover disney duo erect_nipples eyewear fangs female food food_fetish food_play fruit genital_fluids genitals glasses halloween hat headgear headwear hi_res holidays horn inverted_cross jack-o'-lantern jewelry legwear mammal mature_anthro mature_female mostly_nude necklace nipples open_mouth open_smile penetration plant pumpkin rebecca_cunningham red_eyes restrained simple_background smile talespin teeth tentacles text thigh_highs toriel_(underfell) torn_clothing transparent_background underfell undertale undertale_(series) vaginal vaginal_fluids vaginal_penetration vines vulva witch_hat yawg yellow_sclera
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