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1other 2boys black_hair black_shorts blue_jacket blue_shirt blue_shorts blush boots brothers child closed_eyes cosplay costume_switch frisk_(undertale) hood hood_down hooded_jacket jacket korokor59513559 multiple_boys open_clothes open_jacket open_mouth papyrus_(undertale) sans shirt short_hair shorts siblings skeleton slippers smile teeth twitter_username undertale white_shirt 3boys black_pants black_shorts blue_jacket blush bottle brothers english_text father_and_son food food_on_clothes food_on_face frying_pan holding holding_bottle hood hood_down hooded_jacket jacket ketchup ketchup_bottle korokor59513559 looking_at_another male_focus multiple_boys nervous_sweating open_mouth pants papyrus_(undertale) sans shorts siblings skeleton spatula sweat teeth twitter_username undertale w.d._gaster 2boys artist_name black_pants blue_jacket blush book book_stack brothers crescent gloves green_shirt highres hood hood_down hooded_jacket jacket korokor59513559 lying male_focus moon multiple_boys night night_sky on_stomach open_book open_mouth pants papyrus_(undertale) pointing reading red_gloves red_scarf sans scarf shirt siblings skeleton sky smile star_(sky) starry_sky stuffed_animal stuffed_rabbit stuffed_toy teeth twitter_username undertale w.d._gaster white_shirt 2boys artist_name blue_jacket book brothers closed_eyes glasses highres holding holding_book hood hood_down hooded_jacket jacket korokor59513559 looking_at_another lying male_focus multiple_boys on_back open_book open_clothes open_jacket papyrus_(undertale) pillow reading red_shirt sans shirt siblings skeleton sleeping smile stuffed_animal stuffed_rabbit stuffed_toy teeth twitter_username undertale white_shirt >_< 1other 2boys 3girls alphys ball beach beachball bikini black_shirt blue_jacket book day fins frisk_(undertale) goat_girl goat_horns head_fins highres holding holding_ball holding_book hood hood_down hooded_jacket horns jacket korokor59513559 long_hair looking_at_another monster_girl multiple_boys multiple_girls open_book open_clothes open_jacket open_mouth outdoors papyrus_(undertale) ponytail red_hair red_jacket sans shirt sitting skeleton sky smile swimsuit teeth toriel undertale undyne water yellow_bikini 3boys apron blue_apron blue_jacket blush brothers chef_hat closed_eyes crying crying_with_eyes_open cup cup_ramen father_and_son hat highres holding holding_cup holding_plate hood hood_down hooded_jacket jacket korokor59513559 lab_coat male_focus multiple_boys open_clothes open_jacket open_mouth papyrus_(undertale) plate red_apron sans shirt siblings skeleton smile streaming_tears tears teeth twitter_username undertale w.d._gaster white_shirt 1other 2boys black_hair black_shorts blue_jacket boots cloud day frisk_(undertale) gasterblaster glowing glowing_eye highres hood hood_down hooded_jacket jacket korokor59513559 looking_at_another multiple_boys open_clothes open_jacket open_mouth outdoors papyrus_(undertale) red_scarf sans scarf shirt short_hair shorts sitting skeleton sky smile teeth undertale white_shirt 1other 2boys black_hair blue_jacket brothers cake cake_slice child closed_eyes closed_mouth food frisk_(undertale) hood hood_down hooded_jacket jacket korokor59513559 multiple_boys open_clothes open_jacket open_mouth papyrus_(undertale) sans shirt short_hair siblings skeleton smile teeth twitter_username undertale white_shirt 1other 2boys apron asriel_dreemurr black_hair blue_jacket brothers cake chara_(undertale) child copyright_name food food_on_face frisk_(undertale) fruit highres hood hood_down hooded_jacket jacket korokor59513559 looking_at_another multiple_boys one_eye_closed open_clothes open_jacket open_mouth papyrus_(undertale) red_scarf sans scarf shirt short_hair siblings skeleton smile strawberry strawberry_slice teeth toriel twitter_username undertale white_apron white_shirt 1other 3boys 3girls alphys anniversary artist_name asriel_dreemurr beard black_hair black_pants black_shorts blonde_hair blue_jacket blue_skin blush book car child closed_mouth colored_skin facial_hair fins frisk_(undertale) goat_boy goat_girl head_fins highres holding holding_book holding_telescope hood hood_down hooded_jacket horns jacket korokor59513559 long_hair monster_girl motor_vehicle multiple_boys multiple_girls night night_sky open_book open_clothes open_jacket pants papyrus_(undertale) red_hair red_scarf reptile_girl sans scarf short_hair shorts sitting skeleton sky smile star_(sky) starry_sky teeth telescope toriel twitter_username undertale undyne yellow_skin 2boys black_shorts blue_jacket boots brothers english_text gloves highres hood hood_down hooded_jacket jacket korokor59513559 male_focus multiple_boys papyrus_(undertale) red_gloves red_scarf sans scarf shorts siblings skeleton teeth translation_request undertale water 3boys apron blue_jacket brothers character_cookie chef closed_eyes cookie cooking dough father_and_son food highres hood hood_down hooded_jacket jacket kneading korokor59513559 looking_at_another male_focus multiple_boys one_eye_closed open_clothes open_jacket open_mouth papyrus_(undertale) pink_apron sans shirt siblings skeleton smile teeth undertale w.d._gaster white_shirt 2boys blue_jacket blush brothers gloves highres hood hood_down hooded_jacket jacket korokor59513559 male_focus multiple_boys night night_sky open_clothes open_jacket open_mouth outdoors papyrus_(undertale) red_gloves red_scarf sans scarf shirt siblings skeleton sky smile star_(sky) starry_sky teeth undertale white_shirt +++ 2boys black_sclera blue_jacket blush bright_pupils brothers colored_sclera commentary_request eating food fork fur-trimmed_jacket fur_trim holding holding_fork jacket long_sleeves looking_at_another meatball mouth_hold multiple_boys noodles open_clothes open_jacket open_mouth papyrus_(undertale) pasta puffy_long_sleeves puffy_sleeves red_scarf sans scarf shirt siblings skeleton smile spaghetti spaghetti_and_meatballs sparkling_eyes suzune_hapinesu sweat teeth undertale upper_body wavy_eyebrows white_background white_pupils white_shirt 3d_(artwork) animal_humanoid ball_gag being_watched bent_over big_breasts big_butt blue_body bound breasts bubble_butt butt curvy_body curvy_female curvy_figure digital_media_(artwork) ear_fins female fin fish fish_humanoid gag glistening glistening_body grillby group hair hi_res humanoid joom3y_(artist) looking_at_another looking_back male male/female marine marine_humanoid monster nude oiled oiled_body oiled_butt papyrus_(undertale) ponytail poster red_hair source_filmmaker thick_thighs trio undertale undertale_(series) undyne wet wide_hips 2016 :3 amalgamate amamidori ambiguous_gender animated_skeleton annoying_dog_(undertale) anthro artist_name beanie black_background bone boots bottomwear bow_(feature) canid canine canis christmas christmas_tree clothed clothing digital_media_(artwork) digital_painting_(artwork) domestic_dog elemental_creature endogeny evergreen_tree eyes_always_closed eyes_closed faceless female footwear frisk_(undertale) fur gift gloves greater_dog greyscale group hair hand_holding hand_in_pocket handwear hat headgear headwear holidays hood hood_up hoodie human humanoid insect_wings knit_hat low_res male mammal mineral_fauna monochrome monster mouse mouth_obstructed multi_leg multi_limb murid murine open_mouth papyrus_(undertale) pine_tree plant pockets restricted_palette rodent sans_(undertale) scarf scarf_mouse shorts signature simple_background skeleton smile snow snow_creature snowman_(species) tail teeth text topwear tree undead undertale undertale_(series) walking whimsun white_text wings 2020 alphys ambiguous_gender animal_humanoid animated_skeleton annoying_dog_(undertale) anthro arachnid arthropod asgore_dreemurr asriel_dreemurr_(god_form) bone bovid caprine clothed clothing digital_drawing_(artwork) digital_media_(artwork) dummy_(undertale) english_text female fish fish_humanoid flowey_the_flower frisk_(undertale) gaster ghost goat hi_res human humanoid lizard male mammal marine marine_humanoid mettaton mettaton_ex monster_kid muffet napstablook nelnal papyrus_(undertale) reptile sans_(undertale) scalie skeleton spider spirit text toriel undead undertale undertale_(series) undyne 1other 2boys alternate_hairstyle androgynous black_shirt black_skirt black_sleeves bow bowtie brooch closed_eyes closed_mouth commentary cosplay crop_top crossdressing cure_black cure_black_(cosplay) cure_white cure_white_(cosplay) detached_leggings detached_sleeves earrings expressionless frilled_skirt frills frisk_(undertale) full_body futari_wa_precure futari_wa_precure_max_heart gedougawa glowing glowing_eye green_background grin heart heart_brooch heart_earrings highres jewelry looking_at_viewer multiple_boys open_mouth papyrus_(undertale) parody pink_bow pink_bowtie pink_brooch precure red_footwear sans shiny_luminous shiny_luminous_(cosplay) shirt shoes short_bangs short_hair simple_background skeleton skirt skirt_set smile sparkle standing translation_request undead undertale white_bow white_bowtie white_footwear white_shirt white_skirt white_sleeves ambiguous_gender animated_skeleton bone boots clothed clothing footwear gloves handwear hi_res humanoid meme not_furry open_mouth papyrus_(undertale) pixelated redcrystal scarf skeleton solo television undead undertale undertale_(series) <3 :3 alphys animate_inanimate animated_skeleton annoying_dog_(undertale) anthro asgore_dreemurr bodily_fluids bone boss_monster bovid brown_background canid canine canis caprine child closed_smile crying doggo_(undertale) domestic_dog elemental_creature eyes_closed female feral fish flora_fauna flower flower_creature flowey_the_flower frisk_(undertale) froggit frown_eyebrows ghost greater_dog grin group headphones hi_res ionicisaac large_group logo mad_dummy male mammal marine mettaton microphone monster_kid mouth_closed napstablook open_mouth open_smile papyrus_(undertale) plant sans_(undertale) simple_background skeleton smile smoke smoke_puff spirit startled tears temmie_(undertale) toriel toriel_(undertale) undead undertale undertale_(series) undyne wallpaper whimsum widescreen young bone boots clothing coat footwear hair male melee_weapon papyrus_(undertale) sanscash_(artist) sephiroth silver_hair skeleton solo sword topwear undertale undertale_(series) weapon 0725akaba :> absurdres arrow_(symbol) bandana blue_background brown_hair chara_(undertale) character_request closed_eyes closed_mouth flower flowey_(undertale) food food_on_head frisk_(undertale) grin heart highres hot_dog object_on_head papyrus_(undertale) red_eyes sans simple_background skeleton smile toriel translation_request undertale yellow_flower |_| 1girl :d absurdres black_coat blue_eyes blue_hair chair coat controller dress furude_rika game_controller gaming_chair hand_on_own_face hanyuu head_tilt highres higurashi_no_naku_koro_ni horns loose_clothes microphone papyrus_(undertale) pink_headphones purple_hair sinrin_uo smile sundress swivel_chair tearing_up 1boy american_football_uniform backwards_hat bone book english_text exposed_bone gloves hat highres holding holding_book papyrus_(undertale) reading shorts sitting skeleton skull spine sportswear teeth undead undertale yyf_(seaknight) absurd_res annoyed anthro areola big_areola big_breasts bone bovid breasts caprine clothing female flashing flashing_breasts floppy_ears fur goat group hi_res horn huge_breasts hypnosis looking_at_breasts male mammal mature_female mind_control monstrousfrog motion_lines navel nipples papyrus_(undertale) red_eyes robe sans_(undertale) skeleton speech_bubble spitting_drink text tits_out toriel trio undertale undertale_(series) white_body white_fur 1other 2boys androgynous bone boots bright_pupils brown_hair closed_eyes colored_sclera frisk_(undertale) gloves grin highres hollow_mouth hood hoodie korokor59513559 long_sleeves monster_boy multiple_boys papyrus_(undertale) ribs sans scarf shirt short_hair shorts skeleton skull smile spine striped striped_shirt striped_sweater sweater teeth undead undertale white_pupils 2023 4:3 anthro azulin_(unicorn_wars) bear blue_body blue_eyes bottomwear clothing cosplay crossover crossover_cosplay duo fazbeast gordi_(unicorn_wars) hi_res mammal one_eye_closed papyrus_(undertale) sans_(undertale) shirt shorts simple_background slightly_chubby topwear undertale undertale_(series) unicorn_wars wink 2_horns ambiguous_gender animated_skeleton annoying_dog_(undertale) anthro artist_name backwards_hat ball basketball basketball_(ball) basketball_court basketball_hoop black_border black_eyes black_pupils blue_body blue_skin bluestickboi bone border boss_monster bovid brown_hair canid canine canis caprine closed_smile clothed clothing crossover darkner deltarune domestic_dog eye_patch eyes_closed eyewear female feral fin fish floppy_ears frisk_(undertale) fur glistening glistening_hair goat group hair hair_over_eyes hat head_fin head_spikes headgear headwear hi_res holding_basketball horn human kris_(deltarune) long_nose long_tail machine male mammal marine mettaton monster monster_kid mouth_closed open_mouth open_smile papyrus_(undertale) poker_face ponytail pupils quadruped red_hair robot sans sharp_teeth short_hair skeleton smile spamton_g._spamton spikes spikes_(anatomy) sport standing style_parody tail teeth teeth_showing toriel undead undertale undertale_(series) undyne watermark white_body white_ears white_fur white_horn yellow_body yellow_sclera yellow_skin yellow_tail yellow_teeth absurd_res alphys anal anal_beads anal_beads_in_ass anal_beads_in_nipple anal_penetration animated_skeleton anus balls big_breasts big_butt big_penis blue_body blush bodily_fluids bone bovid breast_play breasts buckteeth butt clothed clothing comic cum dialogue digital_media_(artwork) dildo ejaculation english_text erection eye_patch eyewear fish frisk_(undertale) frozenartifice genital_fluids genitals glasses hair hi_res huge_breasts huge_penis hyper hyper_genitalia hyper_penis intersex lizard mammal marine nipple_fetish nipple_penetration nipple_play nipples non-mammal_breasts not_furry nude object_in_ass open_mouth oral papyrus_(undertale) penetration penis pussy red_hair reptile rimming sans_(undertale) scalie sex sex_toy sex_toy_in_ass sex_toy_in_nipple sex_toy_insertion skeleton smile speech_bubble teeth text thick_thighs titfuck undead undertale undertale_(series) undyne vibrator wide_hips absurd_res alphys anal anal_beads anal_beads_in_ass anal_beads_in_nipple anal_penetration animated_skeleton balls big_breasts big_butt big_penis blue_body blush bodily_fluids bone bovid breast_play breasts buckteeth butt clothed clothing comic cum dialogue digital_media_(artwork) dildo english_text erection eye_patch eyewear fish frisk_(undertale) frozenartifice genital_fluids genitals glasses hair hi_res huge_penis hyper hyper_cockhuge_breasts intersex lizard mammal marine nipple_fetish nipple_penetration nipple_play nipples non-mammal_breasts not_furry nude object_in_ass open_mouth papyrus_(undertale) penetration penis pussy red_hair reptile sans_(undertale) scalie sex sex_toy sex_toy_in_ass sex_toy_in_nipple sex_toy_insertion skeleton smile speech_bubble teeth text thick_thighs titfuck undead undertale undertale_(series) undyne vibrator wide_hips 2boys :d artist_name bed book boy_(rakuen) brown_eyes commentary commission english_commentary highres intravenous_drip male_focus multiple_boys open_mouth paper_hat papyrus_(undertale) pillow polaris_(polarissketches) rakuen rakuen_(series) reading red_mittens red_scarf scarf shirt skeleton smile under_covers undertale yellow_shirt <3 absurd_res anthro armor beard big_breasts big_penis blade bladed_helmet bone bottomwear bracers breasts chainmail clothed clothing comic duo facial_hair gender_confusion genitals gynomorph hair halberd hat hat_feather hat_ornament headgear headwear helmet hi_res human intersex karakylia loincloth loose_feather male mammal markus_kruber melee_weapon murid murine nipple_outline papyrus_(undertale) penis plate_armor pogchamp polearm rat reveal rodent sans_(undertale) short_hair skaven skimpy skull spikes surprise surprised_expression trophy_rack unconvincing_armor under_boob undertale undertale_(series) vein veiny_penis vermintide warhammer_(franchise) warhammer_fantasy weapon 1other 3boys 4girls animated animated_gif antlers artist_name beak berdly_(deltarune) clothes_around_waist deltarune ditchu evo_moment_#37 evolution_championship_series fighting fighting_stance gameplay_mechanics health_bar highres jevil kicking kris_(deltarune) monster_boy monster_girl monster_kid_(undertale) multiple_boys multiple_girls noelle_holiday papyrus_(undertale) parody parrying pixel_art road sans silhouette street street_fighter street_fighter_iii_(series) tank_top undertale undyne 2023 absurd_res animated_skeleton bald beverage beverage_can black_eyes black_pupils blueprint bone bottomwear can cigarette cigarette_in_mouth cigarette_smoke clothed clothing coat container crumpled_paper detailed duo earless english_text eraser eyewear footwear glasses glistening glistening_eyewear glistening_glasses glistening_sunglasses glowing glowing_eyes half-closed_eyes hand_in_pocket happy hi_res hoodie humanoid laboratory_equipment laboratory_glassware looking_at_viewer machine male mweshmallow narrowed_eyes noseless not_furry object_in_mouth open_mouth pants paper papyrus_(undertale) pencil_(object) pockets pose pupils raised_arm rib_cage sans_(undertale) scientific_instrument selfie shadow shirt shoelaces shoes shorts sitting size_difference skeleton sketch sketch_page skull slippers small_pupils smile smiling_at_viewer smoke smug smug_expression smug_eyes smug_face smug_grin standing sunglasses sweater teeth test_tube test_tube_rack text toony topwear undead undertale undertale_(series) white_eyes white_pupils whiteboard wire animated_skeleton annoyed bone brother brothers clothing comic costume dialogue duo eyeless gloves handwear hoodie humanoid humor male maxoke open_mouth papyrus_(undertale) pun rubber_band sans_(undertale) scarf sibling skeleton smug smug_face speechless sweater talking_to_another teeth topwear undead undertale undertale_(series) 2018 animated_skeleton bed blush bodily_fluids bone bottomwear clothed clothing cum cum_on_face cum_on_hand dialogue ejaculation english_text furniture genital_fluids genitals gloves handwear looking_at_viewer male masturbation moan on_bed one_eye_closed onomatopoeia open_shorts papyrus_(undertale) penis penis_through_fly pillow poking_out prehensile_penis raised_clothing raised_shirt raised_topwear scarf shirt shorts skeleton solo sound_effects speech_bubble teeth text theyaois_(artist) tongue tongue_out topwear undead undertale undertale_(series) animated_skeleton blush bone bottomwear clothed clothing erection genitals gloves glowing glowing_genitalia glowing_penis grin handwear hi_res holding_leash holding_object holding_penis leash licking licking_lips looking_at_viewer male open_bottomwear open_clothing open_pants pants papyrus_(underfell) papyrus_(undertale) penis penis_through_fly poking_out scar scarf shirt skeleton smile theyaois_(artist) tongue tongue_out topwear undead undertale undertale_(series) <3 animated_skeleton blush bodily_fluids bone bottomwear cigarette cigarette_in_mouth clothed clothing english_text erection genital_fluids genitals gesture hi_res hoodie looking_at_viewer male object_in_mouth open_bottomwear open_clothing open_pants pants papyrus_(underswap) papyrus_(undertale) penis penis_through_fly poking_out precum precum_bead selfie skeleton solo text theyaois_(artist) tongue tongue_out topwear undead undertale undertale_(series) v_sign accessory animated_skeleton bdsm blush bodily_fluids bondage bone bottomwear bound clothed clothing cock_ring cracked_skull cuff_(restraint) dialogue dripping english_text erection genital_fluids genital_piercing genitals gold_(metal) gold_tooth hi_res jewelry looking_at_viewer male open_bottomwear open_clothing open_pants orgasm_denial pants papyrus_(swapfell) papyrus_(undertale) penis penis_accessory penis_jewelry penis_piercing penis_through_fly piercing poking_out precum precum_drip restraints rope rope_bondage sharp_teeth skeleton solo speech_bubble sweater tears teeth text theyaois_(artist) tongue tongue_out topwear undead undertale undertale_(series) alternate_universe crossover cyborg doom_(series) fire non-web_source papyrus_(undertale) redesign revenant_(doom) robot skeleton terry_jones_(tyrranux) undertale 2022 5_toes abs aircraft alphys animal_humanoid animated_skeleton anthro blue_body blue_scales bone burgerpants claws clothing domestic_cat duo_focus eye_patch eyewear feet felid feline felis female fish fish_humanoid flexing footwear ghost group helicopter hi_res high_heels humanoid humanoid_feet japanese_text lizard lyrics machine male mammal marine marine_humanoid mettaton mettaton_ex micchan_sense microphone muscular muscular_female napstablook papyrus_(undertale) plantigrade reptile robot scales scalie singing skeleton spirit summer swimwear text toe_claws toes translated undead undertale undertale_(series) undyne water 2018 alphys animal_humanoid animated_skeleton anthro bone boss_monster bovid caprine comic ear_frill female female/female fish fish_humanoid frill_(anatomy) frisk_(undertale) goat hi_res human humanoid japanese_text lizard mammal marine marine_humanoid nam on_lap papyrus_(undertale) reptile scalie skeleton snow snowball_fight snowman text toriel undead undertale undertale_(series) undyne young