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aearia_(artist) alphys ambiguous_gender animated_skeleton anthro arachnid arthropod asgore_dreemurr asian_clothing asriel_dreemurr beard black_border blonde_hair bone border boss_monster_(undertale) bovid burgerpants caprine chara_(undertale) child clothing domestic_cat east_asian_clothing elemental_creature eye_patch eyewear facial_hair felid feline felis female fish flora_fauna flower flowey_the_flower fur ghost glasses group hair hi_res horn human japanese_clothing japanese_school_uniform lagomorph leporid lizard long_ears machine male mammal marine mettaton muffet napstablook nicecream_man papyrus_(undertale) plant rabbit reptile robot sans_(undertale) scalie school_uniform serafuku skeleton spider spirit tem temmie_(undertale) toriel undead undertale undertale_(series) undyne uniform white_body white_fur young young_ambiguous young_anthro young_female young_human absolutely_everyone abstract_pattern alphys amalgamate amazing_background ambiguous_gender animal_humanoid animate_inanimate animated_skeleton arachnid arachnid_humanoid arthropod arthropod_humanoid asgore_dreemurr asriel_dreemurr astigmatism avian bird black_clothing black_shirt black_topwear blue_body blue_clothing blue_jacket blue_topwear bone boss_monster_(undertale) bottomwear bovid brown_hair canid canine canis caprine chara_(undertale) clasped_hands clothing cloud crown detail detailed detailed_background dogamy dogaressa domestic_dog dragging dummy_(undertale) ear_fins elemental_creature endogeny eye_patch eyelashes eyewear fangs female fin fish fish_humanoid floppy_ears flora_fauna floral_pattern flower flowey_the_flower footwear froggit fur gaster geometric_pattern gesture ghost glasses grass green_bottomwear green_clothing green_pants green_shirt green_topwear grey_hair grin group hair hand_gesture hand_holding headgear heart_symbol hi_res holding_object horn human humanoid jacket jerry_(undertale) large_group leading leaf lizard looking_back loox lying mad_dummy madjick male mammal marine marine_humanoid melee_weapon mettaton migosp moldessa moldsmal monster_kid muffet multi_eye napstablook on_front open_mouth open_smile ornate pants papyrus_(undertale) pattern_clothing pattern_shirt pattern_topwear pigtails pillar plant pointing polearm ponytail psychedelic psychedelic_pattern purple_clothing purple_robe reaper_bird red_hair red_scarf reptile robe rokuyon sans_(undertale) scalie scarf shirt shoes skeleton smile snowdrake spider spider_humanoid spirit standing star striped_clothing striped_shirt striped_topwear stripes sun tan_body tan_skin teeth temmie_(undertale) topwear toriel trident undead undertale undertale_(series) undyne vegetoid vines vulkin walking weapon whimsun white_body white_fur woshua yellow_body 2019 3:4 adamayster anthro asriel_dreemurr big_breasts boss_monster_(undertale) bovid breasts caprine chara_(undertale) christmas cleavage clothed clothing female frisk_(undertale) gift glowing group hair hi_res holidays horn human mammal nipple_outline red_eyes simple_background smile toriel undertale undertale_(series) 4_fingers abstract_pattern accessory alphys amalgamate amazing_background ambiguous_gender animal_humanoid animated_skeleton anthro arch architecture armband asgore_dreemurr asriel_dreemurr asriel_dreemurr_(god_form) bangle bangs banner barefoot beard black_body black_fur blonde_hair blue_eyes bodypaint bone book boots boss_monster_(undertale) bottomwear bovid bow_(feature) bow_tie bracelet brown_bottomwear brown_clothing brown_pants candle cape caprine chara_(undertale) chopsticks chullo circlet clasped_hands cloak clothed clothing cloud crown cute_fangs d: decoration delta_rune_(emblem) deltarune detail detailed detailed_background dome dragon dummy_(undertale) ear_fins ear_frill ear_piercing ear_ring endogeny eye_patch eyewear face_paint facial_hair feet female fin final_froggit fingers fire fish fish_humanoid flask floppy_ears floral_pattern flower food footwear frill_(anatomy) frisk_(undertale) froggit fully_clothed fur geometric_pattern glasses goat green_clothing green_eyes green_hat green_headwear green_shirt green_topwear grey_eyes group hair hair_accessory hand_in_pocket hands_on_shoulders hat head_spikes headband headdress headgear headwear heart_symbol hi_res holding_knife holding_object horn hug human humanoid inside jewelry knife kris_(deltarune) large_group layered_heart leaf lizard long_hair loox madjick male mammal mantle marine marine_humanoid mask melee_weapon migosp moldsmal monster_kid multicolored_boots multicolored_bottomwear multicolored_bracelet multicolored_clothing multicolored_crown multicolored_footwear multicolored_headwear multicolored_necktie multicolored_robe multicolored_topwear mural mythological_creature mythological_scalie mythology napstablook necklace necktie noodles noseless open_mouth open_smile ornate ornate_clothing pants papyrus_(undertale) pattern_bracelet pattern_clothing pattern_scarf piercing plant pockets polearm ponytail psychedelic psychedelic_pattern pupils purple_body purple_clothing purple_robe purple_scarf ralsei reaper_bird rectangular_glasses red_eyes red_hair red_scarf reptile ribbons ring ring_piercing robe rokuyon samael_(samael) sans_(undertale) scalie scarf shirt shoes shorts skeleton slit_pupils smile snowdrake's_mother so_sorry_(character) spear spiked_armband spikes spikes_(anatomy) standing star star_pattern string_bow string_bow_tie striped_clothing striped_scarf stripes sun susie_(deltarune) symbol symbolism tan_body tan_skin tassels temmie_(undertale) tiara tile topwear toriel umbrella undead undertale undertale_(series) undyne vegetoid vest vulkin waldo_(where's_waldo?) weapon where's_waldo? whimsun white_body white_fur wizard_hat yellow_body yellow_eyes yellow_sclera 6+boys 6+girls 6+others aaron_(undertale) alphys annoying_dog armor asgore_dreemurr asriel_dreemurr bad_id bad_pixiv_id berdly_(deltarune) bird_that_carries_you_over_a_disproportionately_small_gap bratty_(undertale) buck_teeth burgerpants business_dude_1 catty_(undertale) chara_(undertale) character_request chief_undyne commentary_request crossover deltarune diamond_receptionist dogamy dogaressa doggo_(undertale) dress drunk_bun endogeny everyone fang flowey_(undertale) frisk_(undertale) fuku_fire furry furry_male gerson grillby hand_receptionist headband highres hood hoodie ice_cap inn_keeper_(undertale) jevil king_(deltarune) kris_(deltarune) lancer_(deltarune) mad_mew_mew madjick mettaton mettaton_ex migosp monster_kid_(undertale) multiple_boys multiple_girls multiple_others napstablook neruco noelle_holiday onionsan papyrus_(undertale) pyrope_(undertale) ralsei reaper_bird rouxls_kaard sans_(undertale) scarf seam_(deltarune) shorts shyren skateboard_girl_(undertale) skeleton slippers smile snowdin_shopkeeper snowdrake's_mother so_sorry_(undertale) stick susie_(deltarune) teeth temmie toriel undertale undyne w.d._gaster whimsun 2017 4_fingers ambiguous_gender anthro asriel_dreemurr biped blush boss_monster_(undertale) bovid caprine chara_(undertale) claws clothed clothing duo fingers fur hair heart_symbol hi_res horn human ino_shi long_ears male mammal question_mark simple_background soul standing transformation undertale undertale_(series) white_body white_fur young ... 3others :t =_= blush_stickers brown_hair chara_(undertale) commentary_request deltarune food food_in_mouth food_on_face frisk_(undertale) hair_over_eyes highres holding holding_sign kitsune_no_ko kris_(deltarune) long_sleeves multiple_others other_focus punishment ripping shirt sign sign_around_neck spoken_ellipsis squatting striped_clothes striped_shirt translated undertale 3others :> anger_vein blush_stickers brown_hair chara_(undertale) commentary_request deltarune food frisk_(undertale) heart heart_necklace highres holding holding_food holding_weapon jewelry kitsune_no_ko knife kris_(deltarune) long_sleeves multiple_others necklace other_focus simple_background stick striped_clothes striped_sweater sweater undertale weapon |_| 1other androgynous black_eyes blush_stickers brown_hair chara_(undertale) commentary_request flower_pot flowey_(undertale) heart heart_necklace highres horror_(theme) jewelry locket necklace open_mouth pendant photo_(object) selfie sennin_(omega-zeus) simple_background solid_oval_eyes spoilers striped translated undertale white_background 16:9 2019 3d_(artwork) 4k absurd_res accessory adopted_(lore) adoptive_sibling_(lore) adoptive_sister_(lore) adoptive_sisters_(lore) age_difference anthro asriel_dreemurr_(god_form) big_penis blush bodily_fluids boss_monster_(undertale) bovid brother_(lore) brother_and_sister_(lore) butt caprine cemetery chara_(undertale) claws clothed clothing collaborative collaborative_fellatio collaborative_sex cosplay costume cum cum_in_mouth cum_inside dark_magician_girl daughter_(lore) digital_media_(artwork) duel_monster erection fellatio female fingers food foursome frisk_(undertale) fruit fur gangbang genital_fluids genitals gloves glowing glowing_eyes group group_sex hair half-closed_eyes halloween hand_on_belly hand_on_head hand_on_shoulder handwear hat headband headgear headwear hi_res holidays horn human incest_(lore) konami licking long_ears looking_at_viewer male male/female mammal mature_anthro mature_female mother_(lore) mother_and_child_(lore) mother_and_daughter_(lore) mother_and_son_(lore) narrowed_eyes nier_automata one_eye_closed open_mouth oral oral_penetration parent_(lore) parent_and_child_(lore) parent_and_daughter_(lore) parent_and_son_(lore) penetration penile penis penis_lick plant platinumgames pseudo_incest_(lore) pumpkin red_eyes reverse_gangbang seductive sex sibling_(lore) sister_(lore) smile son_(lore) source_filmmaker_(artwork) tombstone tongue tongue_out toriel tree triple_collaborative_fellatio undertale undertale_(series) white_body white_fur widescreen witch_hat yamimarik1994 yellow_eyes yorha_2b younger_male yu-gi-oh! 16:9 2019 3d_(artwork) 4k absurd_res adopted_(lore) age_difference anthro armwear asriel_dreemurr_(god_form) big_breasts boss_monster_(undertale) bovid breasts brother_(lore) brother_and_sister_(lore) caprine chara_(undertale) choker cleavage clothed clothing cosplay costume dark_magician_girl daughter_(lore) digital_media_(artwork) dress duel_monster epic_games eye_patch eyewear female fingers floppy_ears food fortnite frisk_(undertale) fruit fur gloves glowing glowing_eyes green_eyes group hair halloween handwear hat headgear headwear hi_res holding_object holding_weapon holidays horn human jack-o'-lantern jewelry konami long_ears looking_at_viewer lop_ears male mammal mature_anthro mature_female melee_weapon moon mother_(lore) mother_and_child_(lore) mother_and_daughter_(lore) mother_and_son_(lore) necklace nier_automata night older_female outside parent_(lore) parent_and_child_(lore) parent_and_daughter_(lore) parent_and_son_(lore) plant platinumgames polearm pumpkin red_eyes robe scythe sibling_(lore) sister_(lore) sisters_(lore) sky smile son_(lore) source_filmmaker_(artwork) standing sword thick_thighs toriel tree undertale undertale_(series) weapon white_body white_fur wide_hips widescreen witch_hat yamimarik1994 yorha_2b younger_male yu-gi-oh! 1girl androgynous bad_id bad_pixiv_id breasts brown_hair chara_(undertale) commentary_request cosplay frisk_(undertale) jewelry knife looking_at_viewer looking_back necklace oshiruko_(tsume) pantyhose red_eyes shirt short_hair shorts simple_background small_breasts solo striped_clothes striped_shirt striped_sweater sweater undertale unusually_open_eyes white_background 1other androgynous bad_id bad_pixiv_id blue_jacket brown_hair chara_(undertale) coat commentary fake_blood grey_background heart hood hoodie jacket ketchup ketchup_bottle long_sleeves looking_at_viewer naked_coat navel oshiruko_(tsume) red_eyes sans_(undertale) short_hair simple_background solo undertale zipper 1other androgynous ass bad_id bad_pixiv_id breasts brown_hair chara_(undertale) closed_mouth commentary_request cosplay frisk_(undertale) heart jewelry knife looking_at_viewer looking_back necklace oshiruko_(tsume) other_focus pantyhose red_eyes shirt short_hair shorts simple_background small_breasts smile solo striped_clothes striped_shirt striped_sweater sweater undertale unusually_open_eyes 1girl androgynous ass bad_id bad_pixiv_id blush breasts brown_hair chara_(undertale) closed_mouth commentary_request genderswap genderswap_(otf) heart jewelry looking_at_viewer looking_back necklace oshiruko_(tsume) pantyhose red_eyes shirt short_hair shorts simple_background smile solo striped_clothes striped_shirt undertale 1girl androgynous ass bad_id bad_pixiv_id blush breasts brown_hair chara_(undertale) closed_mouth commentary_request genderswap genderswap_(otf) heart jewelry long_sleeves looking_at_viewer necklace oshiruko_(tsume) pantyhose red_eyes shirt short_hair shorts simple_background smile solo striped_clothes striped_shirt striped_sweater sweater undertale white_background 1girl animal_ear_hairband animal_ears bad_id bad_pixiv_id bandaged_chest bare_shoulders black_hairband black_panties blush breasts brown_hair chara_(undertale) collarbone commentary_request fake_animal_ears fang full_body genderswap genderswap_(otf) green_background green_outline hair_behind_ear hairband kneeling looking_at_viewer navel open_mouth orange_eyes oshiruko_(tsume) outline panties purple_background red_eyes short_hair skin_fang small_breasts solo string_panties sweat undertale underwear v-shaped_eyebrows 1girl aged_up alternate_breast_size bad_id bad_pixiv_id blush breasts chara_(undertale) closed_mouth large_breasts long_sleeves looking_at_viewer monochrome oshiruko_(tsume) shirt short_hair simple_background smile solo striped_clothes striped_shirt underfell underswap undertale white_background 2019 ahegao anthro anthro_penetrated aoino_broome big_breasts bodily_fluids boss_monster_(undertale) bottomless bovid breasts caprine chara_(undertale) clothed clothing conditional_dnp duo faceless_character faceless_human faceless_male female female_focus female_on_human female_penetrated from_behind_position fucked_silly fur genitals horn human human_on_anthro human_penetrating human_penetrating_anthro interspecies looking_pleasured male male/female male_on_anthro male_penetrating male_penetrating_female mammal mature_anthro mature_female nipples open_mouth penetration penile penile_penetration penis penis_in_pussy pussy saliva sex signature solo_focus sweat tongue tongue_out toriel undertale undertale_(series) vaginal vaginal_penetration white_body white_fur ambiguous_gender anthro armor asgore_dreemurr asriel_dreemurr boss_monster_(undertale) bovid caprine chara_(undertale) crown family female flower group headgear hi_res horn human light light_beam long_ears male mammal mature_anthro mature_female mature_male plant stasya-sher toriel undertale undertale_(series) window against_surface against_wall ahegao alphys anal anal_penetration anthro anthro_on_anthro anthro_penetrated anthro_penetrating anthro_penetrating_anthro anus big_butt biped black_hair blush blush_stickers bottomless buckteeth butt chara_(undertale) clothed clothing coat costume crossgender devon_(kingbeast) duo eyewear female female_penetrated from_behind_position genitals glasses gynomorph gynomorph/female gynomorph_penetrating gynomorph_penetrating_female hair hi_res intersex intersex/female intersex_penetrating intersex_penetrating_female interspecies kingbeast knife lab_coat looking_pleasured mammal open_mouth penetration penis pussy reptile scalie sex shirt tail teeth thick_tail thick_thighs tongue tongue_out topwear undertale undertale_(series) 2019 animal_humanoid anthro belly big_breasts blush boss_monster_(undertale) bovid breasts caprine chara_(undertale) cunnilingus curvy_figure digital_media_(artwork) duo female frisk_(undertale) fur horn huge_breasts human humanoid male male/female mammal mature_anthro mature_female moan nipples nude open_mouth oral sans_(undertale) sex simple_background standing thick_thighs toriel undertale undertale_(series) urielmanx7 vaginal voluptuous wide_hips 2019 anthro big_breasts big_butt boss_monster_(undertale) bovid breasts butt caprine chara_(undertale) clothing cunnilingus curvy_figure digital_media_(artwork) english_text female fur genitals group hi_res horn huge_breasts human human_on_anthro interspecies looking_at_viewer male male/female mammal mature_anthro mature_female nipples nude open_mouth oral overweight overweight_female penis pussy sex simple_background solo_focus spread_legs spreading standing text thick_thighs toriel undertale undertale_(series) urielmanx7 vaginal voluptuous white_body wide_hips 1other androgynous bad_id bad_pixiv_id blue_jacket blush brown_hair chara_(undertale) commentary_request glowing heart jacket looking_at_viewer nude open_mouth oshiruko_(tsume) red_eyes sans_(undertale) short_hair simple_background skeleton smile undertale 1other adapted_costume alternate_hair_length alternate_hairstyle androgynous backpack bad_id bad_pixiv_id bag black_dress black_pantyhose boxcutter brown_hair chara_(undertale) dress holding holding_boxcutter holding_weapon long_hair lying on_back oshiruko_(tsume) pantyhose randoseru red_bag single_horizontal_stripe solo underfell underswap undertale weapon yellow_eyes 1other androgynous apron bad_id bad_pixiv_id brown_hair chara_(undertale) closed_mouth commentary_request looking_at_viewer naked_apron oshiruko_(tsume) red_eyes simple_background smile solo undertale 1girl androgynous bad_id bad_pixiv_id blush brown_hair chara_(undertale) commentary_request demon_horns demon_tail demon_wings genderswap genderswap_(otf) horns knife looking_at_viewer navel open_mouth oshiruko_(tsume) red_eyes short_hair simple_background solo swimsuit tail thighhighs undertale wings 2019 5_fingers anthro asriel_dreemurr blush boss_monster_(undertale) bovid bubble caprine chara_(undertale) clothed clothing dialogue double_entendre duo english_text female fingers hair hand_holding hi_res human innuendo male mammal monochrome text tongue undertale undertale_(series) yiori-ut young 1other androgynous bad_id bad_pixiv_id brown_hair chara_(undertale) closed_mouth commentary_request dress legs looking_at_viewer no_pants oshiruko_(tsume) overalls pantyhose red_eyes shirt short_hair smile solo striped_clothes striped_shirt striped_sweater sweater undertale absolutedream armor chara_(undertale) comic dialogue english_text eye_patch eyewear fish forest headgear helmet hi_res human mammal marine sharp_teeth sunset teeth text tree undertale undyne video_games 1other androgynous backpack bad_id bad_pixiv_id bag black_background boxcutter brown_hair chara_(undertale) closed_mouth commentary_request knife looking_at_viewer nevada-tan oshiruko_(tsume) real_life red_eyes shirt short_hair shorts simple_background solo striped_clothes striped_shirt underfell underswap undertale anthro asriel_dreemurr blush boss_monster_(undertale) bovid caprine chara_(undertale) duo female gesture hi_res human humor interspecies male mammal monochrome nervous sex_gesture suggestive suggestive_gesture text undertale undertale_(series) yiori-ut 4_toes anthro anthro_penetrating anthro_penetrating_human anvil_position asriel_dreemurr bangs bed bent_arm bent_legs biting_shirt blush boss_monster_(undertale) bovid caprine chara_(undertale) clothing clueless_sex defloration dialogue duo english_text eye_contact eyelashes feet female female_on_anthro female_penetrated from_front_position furniture grabbing_object grabbing_sheets hair hand_on_leg hand_on_own_leg hand_on_own_thigh hand_on_thigh head_on_pillow hi_res human human_on_anthro human_penetrated humanoid_feet humor interspecies kneeling legs_up looking_at_another lying male male/female male_on_human male_penetrating male_penetrating_female mammal monochrome obscured_penetration on_back on_bed on_furniture penetration pillow plantigrade sex simple_background speech_bubble talking_to_another talking_to_partner text toes undertale undertale_(series) yiori-ut young 1girl androgynous bad_id bad_pixiv_id breasts brown_hair chara_(undertale) commentary_request jewelry knife looking_at_viewer necklace oshiruko_(tsume) pantyhose shirt short_hair shorts simple_background small_breasts solo striped_clothes striped_shirt striped_sweater sweater undertale white_background 1other androgynous bad_id bad_pixiv_id blush brown_hair chara_(undertale) closed_mouth commentary_request jewelry looking_at_viewer necklace oshiruko_(tsume) red_eyes shirt short_hair simple_background smile solo striped_clothes striped_shirt striped_sweater sweater undertale 4_toes absurd_res alternate_species ancientbot anthro areola asriel_dreemurr_(god_form) bangs beach big_breasts bikini black_body black_fur black_sclera blue_sky boss_monster_(undertale) bottomless bottomless_anthro bottomless_female bovid breasts caprine chara_(undertale) clitoris clothed clothing crossgender cupless_bra deltarune eyewear feet female frisk_(undertale) fur genitals glasses goat green_eyes grin group hat headgear headwear hi_res horn ineffective_clothing kris_(deltarune) looking_at_viewer mammal mtf_crossgender navel nipple_outline nipple_slip nipples one-piece_swimsuit pose presenting pussy ralsei red_eyes seaside shadowed_eyes sky sling_bikini smile swimwear take_your_pick teeth toes undertale undertale_(series) white_body white_fur 1other androgynous bad_id bad_pixiv_id brown_hair chara_(undertale) closed_mouth commentary_request legs looking_at_viewer no_pants oshiruko_(tsume) pantyhose red_eyes shirt short_hair smile solo striped_clothes striped_shirt striped_sweater sweater undertale abs anthro armpit_hair asriel_dreemurr_(god_form) biceps big_muscles black_eyes body_hair boss_monster_(undertale) bovid bovine brother_(lore) brothers_(lore) bulge caprine chara_(undertale) duo flexing horn human humanoid male mammal muscular muscular_anthro muscular_male pecs pose sibling_(lore) smile under10mato undertale undertale_(series) 1other androgynous bad_id bad_pixiv_id brown_hair chara_(undertale) closed_mouth commentary_request legs looking_at_viewer no_pants no_shoes oshiruko_(tsume) pantyhose red_eyes shirt short_hair smile solo striped_clothes striped_shirt striped_sweater sweater undertale weapon 1other androgynous bad_id bad_pixiv_id blush brown_hair chara_(undertale) closed_mouth commentary_request looking_at_viewer oshiruko_(tsume) red_eyes short_hair simple_background solo swimsuit swimsuit_under_clothes underswap undertale white_background anthro asriel_dreemurr blush boss_monster_(undertale) bovid breasts caprine chara_(undertale) eyes_closed female female/female female_frisk_(undertale) filler_shmazman french_kissing frisk_(undertale) genitals group group_sex hi_res human human_on_anthro human_on_human interspecies intraspecies kissing mammal nipples pussy sex smile undertale undertale_(series) 1other androgynous bad_id bad_pixiv_id blush brown_hair chara_(undertale) closed_mouth commentary_request jewelry looking_at_viewer necklace oshiruko_(tsume) red_eyes shirt shirt_tug short_hair simple_background smile solo striped_clothes striped_shirt striped_sweater sweater undertale