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3boys 3girls =_= androgynous armor arthropod_girl bad_link black_hair blue_eyes bone brown_hair c: closed_eyes colored_sclera colored_skin cup energy_spear extra_arms extra_eyes eyelashes eyepatch fangs food frisk_(undertale) furry gloves glowing glowing_eye goat_girl graph graph_(object) grin hair_over_one_eye hair_ribbon heart horns jacket knife mettaton mettaton_ex monster muffet muffet's_pet multiple_boys multiple_girls one_eye_closed open_mouth papyrus_(undertale) pie polearm ponytail purple_skin red_eyes red_hair ribbon sans_(undertale) scarf sharp_teeth shirt short_twintails skeleton skull smile snow spear spider_girl spoilers striped_clothes striped_shirt teacup teeth tongue tongue_out toriel twintails two_side_up undertale undyne unoobang weapon yellow_sclera yellow_teeth 2016 2d_animation anal anal_penetration animated animated_skeleton blush bone butt clothed clothing dialogue digital_media_(artwork) duo english_text fel-frisk femboy frame_by_frame from_behind_position genitals hair heart_symbol humanoid humor machine male male/male male_penetrated male_penetrating male_penetrating_male mettaton mettaton_ex not_furry open_mouth papyrus_(undertale) papyton penetration penile penile_penetration penis penis_in_ass robot sex short_playtime skeleton smile stuck text undead undertale undertale_(series) 1:1 2016 anal anal_penetration andromorph andromorph/male anthro anthro_penetrating anthro_penetrating_humanoid asgore_dreemurr balls beard blonde_hair blush bodily_fluids boss_monster_(undertale) bovid butt caprine clothing cum digital_media_(artwork) dongoverlord duo erection facial_hair femboy fur genital_fluids genitals glistening hair hi_res horn humanoid humanoid_on_anthro humanoid_penetrated intersex intersex/male long_ears machine male male_penetrating mammal mettaton mettaton_ex muscular open_mouth orgasm penetration penile penile_penetration penis pussy robot sex soulplay undertale undertale_(series) vaginal vaginal_penetration white_body white_fur alphys animated_skeleton anthro bone clothed clothing dialogue digital_media_(artwork) duo english_text eye_patch eyewear female fish food fruit glasses glistening grape hair keyboard_instrument lizard long_hair machine male marine mettaton mettaton_ex musical_instrument open_mouth papyrus_(undertale) piano plant red_hair reptile robot scalie simple_background skeleton smile text trash_can undead undertale undertale_(series) undyne unknown_artist 2:3 alpha_channel ambiguous_gender chainsaw duo egg english_text food frisk_(undertale) heart_symbol human machine mammal mettaton milk not_furry pdubbsquared power_tool robot text tools undertale undertale_(series) 4_fingers bodily_fluids crossgender crossover female fingers ghost hair humanoid leaf-submas machine mad_dummy mettaton mettaton_ex mtt_brand_legs napstablook not_furry panty_(pswg) panty_and_stocking_with_garterbelt ridiculous_hair robot simple_background spirit stocking_(pswg) style_emulation tears undertale undertale_(series) abra alphys alternate_species ambiguous_gender anthro asgore_dreemurr bovid brock_(pokemon) canid caprine crossover duskull elemental_creature eyes_always_closed eyes_closed female feraligatr flora_fauna flower flower_creature flowey_the_flower frisk_(undertale) generation_1_pokemon generation_2_pokemon generation_3_pokemon generation_6_pokemon goat gogoat group gym_leader hitmonchan horn magneton male mammal mettaton nintendo papyrus_(undertale) plant pokemon pokemon_(species) pokemon_trainer pokemorph sans_(undertale) simple_background skiddo slurpuff sunflora temmie_(undertale) toriel undertale undertale_(series) undyne white_background wooven android bust_portrait hair hair_over_eye handsome_squidward_(meme) humanoid humor machine male manly meme mettaton mettaton_ex monochrome nickelodeon not_furry one_eye_obstructed parody portrait robot robot_humanoid solo spongebob_squarepants squidward_tentacles undertale undertale_(series) absurd_res frisk_(undertale) hi_res human long_image machine mammal mettaton mettaton_ex parody robot tall_image tengen_toppa_gurren_lagann undertale undertale_(series) absurd_res alphys animated_skeleton anthro armless asgore_dreemurr bodily_fluids bone boss_monster_(undertale) bovid caprine clothed clothing elemental_creature fish flora_fauna flowey_the_flower frisk_(undertale) hi_res human korean_text lizard long_image mammal marine mettaton mettaton_ex monster_kid papyrus_(undertale) plant reptile saliva sans_(undertale) scalie skeleton tall_image text translated undead undertale undertale_(series) undyne 2016 bdsm bodily_fluids bondage bound butt clothed clothing cum digital_media_(artwork) erection femboy genital_fluids genitals glistening hair humanoid legwear machine male mettaton mettaton_ex not_furry penis robot simple_background smile solo submissive submissive_male undertale undertale_(series) 1:1 alternate_universe blush chainsaw clothed clothing digital_media_(artwork) fan_character glistening hair hi_res humanoid long_hair machine male mettaton mettaton_(underfell) mettaton_ex mettaton_ex_(underfell) multi_arm multi_eye multi_limb not_furry open_mouth power_tool robot sharp_teeth teeth tools underfell undertale undertale_(series) alternate_universe clothed clothing crossdressing digital_media_(artwork) duo fan_character femboy hair humanoid long_hair looking_at_viewer machine male male/male mettaton mettaton_ex mettaton_ex_(underfell) multi_eye not_furry robot tongue tongue_out underfell undertale undertale_(series) 2016 anthro big_ears black_eye_(injury) bruised canid canine canis cosplay dancing digital_media_(artwork) fan_character femboy hair hi_res hierro hierro_(artist) long_hair long_tail machine male mammal mettaton muscular muscular_anthro muscular_male pose robot sketch solo tail undertale undertale_(series) wolf 1:1 alphys anthro dinosaur duo extinct eyewear fellatio female genitals glasses lizard lumineko machine mettaton mettaton_ex monochrome oral penile prehistoric_species pussy reptile robot scalie sex sketch undertale undertale_(series) 2015 4:3 akane_kyoko alphys android animal_humanoid animated_skeleton annoying_dog_(undertale) anthro armless asgore_dreemurr asriel_dreemurr beard black_tie_(suit) blonde_hair blue_eyes blush bone boss_monster_(undertale) bovid bratty_(undertale) camera caprine chara_(undertale) clothed clothing dancing detailed_background dress duo_focus facial_hair female fish fish_humanoid frisk_(undertale) fur ghost goat group hair heart_symbol hi_res horn human humanoid long_ears machine mad_dummy male mammal marine marine_humanoid mettaton mettaton_ex monster_kid napstablook papyrus_(undertale) reptile robot sans_(undertale) scalie signature skeleton spirit star suit tem temmie_(undertale) toriel undead undertale undertale_(series) undyne wedding wedding_dress white_body white_fur clothed clothing digital_media_(artwork) duo erection femboy food genitals hair hair_over_eye humanoid humor long_hair machine male mettaton mettaton_ex not_furry one_eye_obstructed penis robot selfcest simple_background square_crossover text undertale undertale_(series) animatronic bodily_fluids clothed clothing digital_media_(artwork) drooling femboy fucked_silly hair heart_symbol humanoid long_hair machine male mettaton mettaton_ex not_furry open_mouth robot saliva shaking shivering simple_background solo soulplay undertale undertale_(series) 2016 4_edge_5_me absurd_res alternate_universe clothed clothing digital_media_(artwork) edge_lord english_text fan_character femboy gaiki hair hi_res humanoid humor long_hair machine male maximum_edge mettaton mettaton_(underfell) mettaton_ex mettaton_ex_(underfell) mettaton_neo not_furry open_mouth robot sharp_teeth simple_background teeth text tongue underfell undertale undertale_(series) white_background android femboy glistening hair hi_res humanoid long_hair machine male mettaton mettaton_ex not_furry robot robot_humanoid simple_background smile solo undertale undertale_(series) anal anthro anthro_penetrating anthro_penetrating_humanoid bodily_fluids breasts burgerpants butt clothed clothing crossgender cum digital_media_(artwork) domestic_cat duo erection felid feline felis female fur genital_fluids genitals glistening hair hat headgear headwear hi_res hot_dogging humanoid humanoid_on_anthro humanoid_penetrated long_hair machine male male/female mammal mettaton mettaton_ex monochrome nipples on_bottom on_top penetration penis pink_and_white pussy reverse_cowgirl_position robot sex simple_background smile text text_on_clothing text_on_hat text_on_headwear thigh_sex undertale undertale_(series) vaginal animated_skeleton big_butt black_and_white blush bone butt clothed clothing comic dialogue digital_media_(artwork) english_text femboy hair hotlegmeme humor low_res machine male mettaton mettaton_ex monochrome not_furry open_mouth papyrus_(undertale) papyton robot simple_background skeleton smile text undead undertale undertale_(series) 3d_(artwork) 3d_animation anal anal_penetration animated ball_size_difference ball_slap balls balls_deep big_balls bouncing_balls bouncing_penis clothed clothing digital_media_(artwork) erection femboy from_front_position genitals glistening glowing group hair human human_on_humanoid human_penetrating human_penetrating_humanoid humanoid humanoid_genitalia humanoid_penetrated humanoid_penis interspecies leeterr low_res machine male male/male male_on_human male_on_humanoid male_penetrated male_penetrating male_penetrating_male mammal mettaton mettaton_ex not_furry nude open_mouth penetration penile penile_penetration penis penis_in_ass penis_size_difference robot sex short_playtime slap smile source_filmmaker_(artwork) spread_legs spreading undertale undertale_(series) watermark black_and_white clothed clothing digital_media_(artwork) duo english_text femboy hair hair_over_eye hotlegmeme humanoid humor long_hair machine male mettaton mettaton_ex monochrome not_furry one_eye_obstructed open_mouth robot simple_background text undertale undertale_(series) andromorph andromorph/male andromorph_penetrated animated_skeleton bone clothed clothing duo erection genitals hair humanoid intersex intersex/male intersex_penetrated long_hair looking_at_viewer machine male male_penetrating male_penetrating_andromorph male_penetrating_intersex mettaton mettaton_ex not_furry open_mouth penetration penis pussy robot sans_(undertale) sex skeleton solo_focus soulplay tongue undead undertale undertale_(series) vaginal vaginal_penetration animated_skeleton blush bone clothed clothing duo erection fellatio femboy genitals hair humanoid machine male male/male male_penetrated male_penetrating male_penetrating_male mettaton mettaton_ex not_furry open_mouth oral papyrus_(undertale) papyton penetration penile penis robot rope sex skeleton smile tongue tongue_out undead undertale undertale_(series) yamsgarden 4girls 6+boys alphys alternate_form androgynous android animal_ears annoying_dog armor arthropod_girl asgore_dreemurr asriel_dreemurr blue_eyes blue_jacket blue_shirt blue_shorts boots bow breasts brown_footwear brown_hair brown_shorts cellphone chara_(undertale) cigar closed_eyes commentary_request crazy_eyes crazy_smile cup doggo_(undertale) dress endogeny everyone evil_eyes evil_smile extra_arms extra_eyes facing_away fangs flower flowey_(undertale) food freeze-ex frisk_(undertale) furry furry_female gasterblaster glasses glowing glowing_eye goat_ears green_shirt grin hand_up headphones heart horns iphone jacket lab_coat large_breasts light light_particles looking_to_the_side mad_dummy_(undertale) mettaton mettaton_neo monster monster_kid_(undertale) mouth_hold muffet multiple_boys multiple_girls napstablook papyrus_(undertale) pen_in_pocket phone photoshop_flowey pie pink_shirt pink_skirt plate puffy_short_sleeves puffy_sleeves red_eyes red_hair reverse_grip sans_(undertale) scarf serious shirt short_hair short_sleeves shorts skirt smartphone smile spider_girl spoilers striped_clothes striped_shirt tabard teacup teapot temmie thighhighs toriel undertale undyne undyne_the_undying white_dress wolf_ears alphys animal_humanoid eversorthewry eye_patch eyewear female fish fish_humanoid frisk_(undertale) glasses group hair hair_over_eye humanoid low_res machine male marine marine_humanoid mettaton mettaton_ex monochrome one_eye_obstructed open_mouth robot undertale undertale_(series) undyne androgynous bad_id bad_tumblr_id boots box brown_hair closed_eyes closing comic frisk_(undertale) mettaton morphin_e parody pressing shirt shorts silent_comic striped striped_shirt tengen_toppa_gurren_lagann undertale walking_away 3koma androgynous android bad_id bad_tumblr_id black_hair brown_hair comic fetal_position frisk_(undertale) highres mettaton mettaton_ex morphin_e parody purple_eyes silent_comic sleeping tengen_toppa_gurren_lagann undertale waking_up white_skin androgynous bad_id bad_tumblr_id box brown_hair close-up closed_eyes comic face frisk_(undertale) glowing highres mettaton morphin_e opening parody shaded_face shirt silent_comic sleeping smoke striped striped_shirt sweatdrop tengen_toppa_gurren_lagann undertale upper_body androgynous bad_id bad_tumblr_id boots box brown_hair closed_eyes comic dark_skin frisk_(undertale) hands highres mettaton morphin_e outdoors parody pointing pov pressing rock shirt shorts silent_comic striped striped_shirt tengen_toppa_gurren_lagann undertale absurd_res alphys anthro asgore_dreemurr bat bill_cipher blue_eyes bone brown_body brown_fur brown_hair candy canid canine canis child claire_o'conell clothed clothing cosplay costume crossover deer dessert disney domestic_cat domestic_dog english_text farron_jacques felid feline felis female fennec_fox food fox fur gravity_falls green_eyes group hair halloween hi_res holidays kibbles_(uberquest) kylar_mclaughlin long_hair mammal mason_hamrell mettaton mettaton_ex moon multicolored_body multicolored_fur murid murine night orange_hair papyrus_(undertale) plant procyonid purple_body purple_fur purple_hair raccoon rat red_eyes rodent sans_(undertale) sesame_akane skeleton skidd sky text toriel tree trick_or_treat true_fox two_tone_body two_tone_fur uberquest undertale undertale_(series) undyne white_body white_fur yellow_body yellow_fur young 4:5 android angry anthro burgerpants clothing duo english_text felid fur hat headgear headwear humanoid machine mammal mettaton mettaton_ex robot shirt simple_background text text_on_clothing text_on_hat text_on_headwear topwear undertale undertale_(series) unknown_artist accessory anthro beanie canid canine canis clothing crossover dbkit digital_media_(artwork) domestic_cat domestic_dog electronics elemental_creature elemental_humanoid english_text felid feline felis flora_fauna flower flower_creature flower_humanoid group hat headband headgear headwear humanoid katy_kat machine mammal mettaton microphone parappa parappa_the_rapper petting plant plant_humanoid robot simple_background sony_corporation sony_interactive_entertainment sunny sunny_funny text undertale undertale_(series) white_background clothing digital_media_(artwork) english_text erection femboy genitals glistening hair hair_over_eye humanoid machine male mettaton mettaton_ex not_furry one_eye_obstructed open_mouth penis robot simple_background smile solo sparkles text undertale undertale_(series) 2016 blush clothed clothing crossdressing dialogue digital_media_(artwork) english_text femboy gaiki machine male mettaton not_furry robot solo text undertale undertale_(series) blush cross digital_media_(artwork) disembodied_penis erection femboy genitals hair heart_symbol humanoid intersex machine male maleherm mettaton mettaton_ex not_furry penetration penis robot simple_background smile solo tongue undertale undertale_(series) white_background 3:2 animated_skeleton bone clothed clothing dialogue digital_media_(artwork) duo english_text erection femboy genitals hair humanoid machine male male/male mettaton mettaton_ex monochrome not_furry open_mouth penis robot sans_(undertale) simple_background skeleton smile teeth text undead undertale undertale_(series) unknown_artist white_background andromorph andromorph/male andromorph_penetrated anthro blush bored burgerpants clothed clothing crossdressing crossgender disinterested_sex domestic_cat duo erection felid feline felis femboy fur genitals hair humanoid intersex intersex/male intersex_penetrated machine male male_penetrating male_penetrating_andromorph male_penetrating_intersex mammal mettaton mettaton_ex mta_crossgender mti_crossgender nude open_mouth penetration penis pussy robot sex shiroiyagi simple_background smile undertale undertale_(series) unimpressed vaginal vaginal_penetration 1:1 clothed clothing digital_media_(artwork) english_text erection genitals glistening hair hair_over_eye heart_symbol humanoid humanoid_genitalia humanoid_penis looking_at_viewer machine male mettaton mettaton_ex not_furry one_eye_obstructed open_mouth penis robot simple_background smile solo text tongue undertale undertale_(series) alternate_universe ambiguous_gender clothed clothing digital_media_(artwork) humanoid low_res machine mettaton mettaton_neo monster not_furry robot simple_background underfell undertale undertale_(series)