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2015 accessory alpha_channel alternate_universe alternative_fashion ambiguous_gender animal_humanoid animated_skeleton anthro arachnid arachnid_humanoid arthropod arthropod_humanoid black_eyes black_hair bone bow_(feature) bow_accessory bow_ribbon bow_tie bravocrow bread brown_hair carhop chair child cigarette clothing croissant dessert doughnut english_text eyewear fangs female feral food footwear frisk_(undertale) furniture glasses grey_body grey_skin group hair hair_accessory hair_bow hair_ribbon hi_res hoodie human humanoid inline_skates j-fashion male mammal muffet muffet_(underswap) multi_arm multi_eye multi_limb ouji_(fashion) papyrus_(underswap) papyrus_(undertale) pastry plate ribbons role_reversal roller_skates sans_(underswap) sign simple_background skeleton smile smoke smoking spider_humanoid table teeth text topwear transparent_background twin_bows twin_hair_bows undead underswap undertale undertale_(series) waiter young

1:1 5_fingers absurd_res alternate_universe animated_skeleton armor black_sclera blue_eyes bone boots bottomwear cargo_shorts cigar clothed clothing duo fan_character fingers footwear fully_clothed gloves hand_in_pocket hands_in_both_pockets handwear heart_symbol hi_res hoodie male not_furry pants papyrus_(underswap) papyrus_(undertale) pockets sans_(underswap) sans_(undertale) shoes shorts shoulder_guards simple_background skeleton smile smoke smoking standing sweater teeth thescarred_(artist) topwear undead underswap undertale undertale_(series) white_background

2015 3:2 alternate_universe angry animated_skeleton bone cape cigarette clothed clothing digital_media_(artwork) english_text fan_character fantasytale food gloves handwear heart_symbol hoodie littletale male not_furry outertale papyrus_(fantasytale) papyrus_(font) papyrus_(outertale) papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) pasta sans_(littletale) scarf skeleton smile spaghetti text toono_(artist) topwear undead underfell underswap undertale undertale_(series)

alternate_universe animated_skeleton bone fan_character group hi_res male papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) razinoats skeleton tentacles trio undead underfell underswap undertale undertale_(series)

16:9 2016 alternate_universe animated_skeleton anterior_nasal_aperture bone chappietriggerhappy cigarette clothed clothed_male clothing digital_media_(artwork) english_text gaster_blaster grin hoodie humanoid male not_furry papyrus_(underswap) papyrus_(undertale) skeleton skull smile smoking solo text text_box topwear undead underswap undertale undertale_(series) widescreen

1:1 animated_skeleton bed blue_eyes blush bodily_fluids bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo ellipsis english_text erection exclamation_point furniture genitals glowing glowing_genitalia glowing_penis heart_symbol humanoid humanoid_genitalia humanoid_penis incest_(lore) kissing lizheru lying male male/male multiple_scenes not_furry papyrus_(font) papyrus_(underswap) papyrus_(undertale) penis question_mark sans_(underswap) sans_(undertale) sibling_(lore) sitting skeleton sweat tears text tongue undead undertale undertale_(series) url

1:1 anal anal_penetration animated_skeleton bed blue_eyes blush bodily_fluids bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo ellipsis english_text erection furniture genitals glowing glowing_genitalia glowing_penis hand_holding heart_symbol humanoid_genitalia humanoid_penis incest_(lore) kissing lizheru lying male male/male male_penetrated male_penetrating male_penetrating_male multiple_scenes not_furry papyrus_(font) papyrus_(underswap) papyrus_(undertale) penetration penis question_mark romantic romantic_couple sans_(underswap) sans_(undertale) sex sibling_(lore) sitting skeletal_anus skeleton sweat tears text tongue undead undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bodily_fluids bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) english_text eyes_closed heart_symbol hug incest_(lore) lizheru male male/male monster multiple_scenes not_furry papyrus_(font) papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) sibling_(lore) skeleton sleeping sweat text undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bodily_fluids bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) english_text eyes_closed heart_symbol hug incest_(lore) licking lizheru male male/male monster multiple_scenes not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) sibling_(lore) skeleton sleeping soul soul_lick sweat text tongue tongue_out undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo english_text erection genitals glowing glowing_genitalia glowing_penis humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male monster multiple_scenes not_furry papyrus_(underswap) papyrus_(undertale) penis sans_(underswap) sans_(undertale) sibling_(lore) skeleton sleeping text undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo english_text erection eyes_closed fellatio genitals glowing glowing_genitalia glowing_penis humanoid_genitalia humanoid_penis incest_(lore) licking lizheru male male/male monster multiple_scenes not_furry oral papyrus_(underswap) papyrus_(undertale) penile penis rubbing sans_(underswap) sans_(undertale) sex sibling_(lore) skeleton sleeping sucking text tongue tongue_out undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo english_text erection eyes_closed fellatio genitals glowing glowing_genitalia glowing_penis humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male monster multiple_scenes not_furry oral papyrus_(font) papyrus_(underswap) papyrus_(undertale) penile penis rubbing sans_(underswap) sans_(undertale) sex sibling_(lore) skeleton sleeping sucking text undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bone brother_(lore) brothers_(lore) comic comic_sans dialogue digital_media_(artwork) duo english_text erection eyes_closed fellatio genitals glowing glowing_genitalia glowing_penis humanoid_genitalia humanoid_penis incest_(lore) licking lizheru male male/male monster multiple_scenes not_furry oral papyrus_(font) papyrus_(underswap) papyrus_(undertale) penile penis rubbing sans_(underswap) sans_(undertale) sex sibling_(lore) skeleton sleeping sucking text tongue tongue_out undead underswap undertale undertale_(series) url

1:1 alternate_universe animated_skeleton bedroom blue_eyes blush bodily_fluids bone brother_(lore) brothers_(lore) comic comic_sans cum cum_in_mouth cum_inside dialogue digital_media_(artwork) drooling duo english_text erection eyes_closed fellatio genital_fluids genitals glowing glowing_cum glowing_genitalia glowing_penis glowing_tongue humanoid_genitalia humanoid_penis incest_(lore) licking lizheru male male/male monster multiple_scenes not_furry oral orgasm papyrus_(font) papyrus_(underswap) papyrus_(undertale) penile penis rubbing saliva sans_(underswap) sans_(undertale) sex sibling_(lore) skeleton sleeping sucking surprised tears text tongue tongue_out undead underswap undertale undertale_(series) unusual_bodily_fluids unusual_cum unusual_genital_fluids url

2d_animation 3:2 alternate_universe animated animated_gif animated_skeleton blue_eyes blush bone brother_(lore) brothers_(lore) deep_throat duo erection fellatio frame_by_frame genitals humanoid humanoid_penetrated incest_(lore) lizheru loop magma_penis male male/male male_penetrated male_penetrating male_penetrating_male not_furry oral oral_only oral_penetration papyrus_(underswap) penetration penile penile_penetration penis penis_in_mouth sans_(underswap) sex short_playtime sibling_(lore) skeleton solo_focus undead 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)

alphys alphys_(underswap) alternate_universe animal_humanoid arachnid arachnid_humanoid armor arthropod arthropod_humanoid bar_stool book boss_monster_(undertale) bovid bow_(feature) bow_tie caprine chara_(underswap) chara_(undertale) clothing coat door english_text eyewear facial_hair furniture glasses group hair hair_bun hoodie humanoid kerchief lab_coat mammal min-play_(artist) monochrome muffet muffet_(underswap) mustache papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) spider_humanoid stool text topwear toriel underswap undertale undertale_(series) undyne undyne_(underswap) window

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)

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)

6:5 alternate_universe ambiguous_gender animated_skeleton band-aid bandage blue_eyes bone boots bottomwear brown_hair candy chara_(storyshift) chara_(undertale) child chocolate cigarette clothed clothing dessert ellipsis english_text family food food_in_mouth footwear fully_clothed gloves group hair handwear heart_symbol hoodie human humanoid kerchief male mammal not_furry open_mouth pants papyrus_(underswap) papyrus_(undertale) pattern_clothing pattern_topwear pose ryuo0917 sans_(underswap) sans_(undertale) shoes shoulder_pads sibling_(lore) signature simple_background size_difference skeleton smile smoke smoking sneakers sparkles star storyshift striped_clothing striped_topwear stripes sweater teeth text topwear undead underswap undertale undertale_(series) white_background yellow_eyes 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)

alternate_universe animated_skeleton blush bone clothing comic dialogue english_text hi_res humanoid male not_furry outerswap outertale papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) skeleton star_eyes text undead undertale undertale_(series) unknown_artist url

2017 alternate_universe animated_skeleton blush bone cigarette clothed clothed_sex clothing digital_drawing_(artwork) digital_media_(artwork) duo erection fellatio flat_colors genitals hi_res humanoid humanoid_genitalia humanoid_penis incest_(lore) male male/male not_furry oral orange_penis papyrus_(underswap) papyrus_(undertale) penile penis sans_(underswap) sans_(undertale) sex simple_background sindrawnup skeleton smoking tongue tongue_out undead underswap undertale undertale_(series) white_background

2015 absurd_res alphys alphys_(underswap) alternate_universe animated_skeleton anthro aquatic arachnid armor arthropod asgore_(underswap) asgore_dreemurr axe beard beverage black_hair black_sclera blue_body blue_eyes blue_fur blue_skin bone boss_monster_(undertale) bovid bow_(feature) bow_tie brother_(lore) brothers_(lore) brown_body brown_fur burger burgerpants burgerpants_(underswap) canid canine canis cape caprine cigarette clothing coat derp_eyes dessert domestic_cat domestic_dog doughnut elemental_creature evil_grin eyewear facial_hair fangs felid feline felis female fire fire_creature fish flora_fauna flower flowey_the_flower food fur gesture ghost glass glasses grey_body grey_hair grey_skin grillby grillby_(underswap) group hair hair_over_eye hand_gesture happstablook hat headgear headwear heart_eyes heart_symbol hi_res hoodie lab_coat lagomorph leporid long_ears machine male mammal melee_weapon mettaton muffet muffet_(underswap) multi_eye multi_limb musical_note musical_symbol napstablook nicecream_man one_eye_obstructed overweight papyrus_(underswap) papyrus_(undertale) pastry pie plant plant_pot popcornpr1nce purple_eyes rabbit red_hair robot role_reversal sans_(underswap) sans_(undertale) scales scalie scar scarf sharp_teeth sibling_(lore) skeleton smile smoke sparkles spider spirit staff suit suspenders symbol tea teapot teeth tem temmie_(underswap) temmie_(undertale) text text_on_clothing text_on_hat text_on_headgear text_on_headwear tongue tongue_out topwear toriel toriel_(underswap) undead underswap undertale undertale_(series) undyne undyne_(underswap) v_sign weapon white_body white_fur yellow_body yellow_scales

6:5 alternate_universe animated_skeleton blush bone brother_(lore) brothers_(lore) clothing duo english_text evilbeetle eyes_closed heart_symbol hi_res humanoid incest_(lore) kissing male male/male not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) sibling_(lore) simple_background skeleton smile text undead underswap undertale undertale_(series) white_background

absurd_res alternate_universe animated_skeleton bone cigarette clothing collar dialogue digital_media_(artwork) duo english_text food hi_res humanoid lasagna nearlydeadzed not_furry papyrus_(font) papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) pasta ravioli sans_(underswap) sans_(undertale) skeleton smile smoking spaghetti taco text unavailable_at_source undead underfell underswap undertale undertale_(series)

11:8 absurd_res aftertale alternate_universe animated_skeleton blood bodily_fluids bone cigarette clothing dialogue english_text hi_res humanoid kerchief loverofpiggies not_furry papyrus_(afterswap) papyrus_(underswap) papyrus_(undertale) skeleton smoking solo text undead underswap undertale undertale_(series) wounded

absurd_res aftertale alternate_universe animated_skeleton blood bodily_fluids bone cigarette clothing hi_res humanoid kerchief loverofpiggies not_furry papyrus_(afterswap) papyrus_(underswap) papyrus_(undertale) skeleton smoking solo undead underswap undertale undertale_(series)

1:1 alternate_universe animated_skeleton blush bone cigarette clothing duo english_text hi_res humanoid male not_furry outerswap outertale papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) skeleton smoking star_eyes text undead underswap undertale undertale_(series) unknown_artist url

5:4 aftertale alternate_universe animated_skeleton blood bodily_fluids bone cigarette clothed clothing dialogue duo english_text geno_sans_(aftertale) glitch hi_res loverofpiggies not_furry papyrus_(underswap) skeleton text undead underswap undertale undertale_(series) wounded

alternate_universe animated_skeleton anterior_nasal_aperture balls blue_tongue blush bodily_fluids bone brother_(lore) brothers_(lore) clothed clothing cum cum_in_mouth cum_inside cum_on_tongue duo faceless_character faceless_male genital_fluids genitals hi_res humanoid humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male not_furry orange_penis papyrus_(underswap) papyrus_(undertale) penis sans_(undertale) sex sibling_(lore) skeleton tongue undead underswap undertale undertale_(series) unzipped zipper

alternate_universe animated_skeleton bone brother_(lore) brothers_(lore) genitals group humanoid humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male not_furry orange_penis papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) penis sans_(undertale) sibling_(lore) skeleton undead underfell underswap undertale undertale_(series)

1:1 alternate_universe animated_skeleton blue_penis bone brother_(lore) brothers_(lore) duo genitals humanoid incest_(lore) lizheru male male/male male_penetrated male_penetrating male_penetrating_male not_furry oral oral_penetration papyrus_(underswap) papyrus_(undertale) penetration penis sans_(underswap) sans_(undertale) sex sibling_(lore) skeleton undead underswap undertale undertale_(series)

alternate_universe animated_skeleton blood bodily_fluids bone brother_(lore) brothers_(lore) duo genitals handjob hi_res humanoid humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male not_furry papyrus_(underswap) penile penis red_penis red_tongue sans_(underfell) sex sibling_(lore) skeleton tongue undead underfell undertale undertale_(series)

alternate_universe animated_skeleton blue_penis bone brother_(lore) brothers_(lore) clothed clothed_sex clothing genitals group humanoid incest_(lore) lizheru male male/male not_furry orange_penis papyrus_(underswap) papyrus_(undertale) penis red_tongue sans_(underfell) sans_(undertale) selfcest sex sibling_(lore) skeleton square_crossover tongue undead underfell underswap undertale undertale_(series)

alternate_universe animated_skeleton bone brother_(lore) brothers_(lore) duo english_text lizheru male not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) sibling_(lore) skeleton text undead underswap undertale undertale_(series)

alternate_universe animated_skeleton bone duo genitals humanoid_genitalia humanoid_penis incest_(lore) lizheru male male/male not_furry orange_penis papyrus_(underswap) papyrus_(undertale) penis sans_(underswap) sans_(undertale) skeleton text undead underswap undertale undertale_(series)

1:1 alternate_universe animated_skeleton bone duo english_text lizheru male not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) skeleton sketch solo_focus text undead underswap undertale undertale_(series)

1:1 alternate_universe anon bone english_text human lizheru mammal not_furry papyrus_(underswap) skeleton text underswap undertale undertale_(series)

1:1 alternate_universe animated_skeleton anon bone genitals human lizheru male mammal not_furry papyrus_(underswap) penis skeleton text undead underswap undertale undertale_(series)

1:1 alternate_universe anon blush bone bottomwear clothing duo english_text eyebrows eyewear faceless_character faceless_male fellatio genitals glasses hand_on_penis heart_symbol human lizheru male mammal not_furry oral pants papyrus_(underswap) papyrus_(undertale) penile penis penis_in_mouth profanity sex skeleton text thought_bubble tongue underswap undertale undertale_(series)

absurd_res alternate_universe animated_skeleton bone english_text fan_character group hi_res lizheru male not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) singing skeleton text undead underswap undertale undertale_(series)

alternate_universe ambiguous_gender animated_skeleton bone crotch_shot hi_res lizheru not_furry papyrus_(underswap) papyrus_(undertale) skeleton solo undead underswap undertale undertale_(series)

alternate_universe animated_skeleton blood bodily_fluids bone death duo hi_res killing lizheru male male_death not_furry papyrus_(underswap) papyrus_(undertale) sans_(underswap) sans_(undertale) skeleton undead underswap undertale undertale_(series) yandere

alternate_universe animated_skeleton bone duo hi_res lizheru not_furry papyrus_(underfell) papyrus_(underswap) skeleton undead underfell underswap undertale undertale_(series)

1:1 alternate_universe animated_skeleton bone english_text group lizheru not_furry papyrus_(underfell) papyrus_(underswap) papyrus_(undertale) sans_(underfell) sans_(underswap) sans_(undertale) skeleton text undead underfell underswap undertale undertale_(series)