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1boy gay gay_male kogito male male_only papyrus solo underswap underswap_papyrus undertale undertale_au yaoi

alternate_universe anthro arachnid arthropod asriel_dreemurr blush boss boss_monster_(undertale) clothing comic dracozhilla duo embarrassed female femboy hi_res humanoid larger_male maid_uniform male male/female muffet size_difference smaller_female spider text underswap underswap_muffet undertale undertale_(series) undertale_au uniform

alternate_universeanthro

2boys 2d blue_blush blue_eyes blue_tongue blush blushing_profusely cum gay incest long_tongue male male/male male_focus male_only orange_penis papyrus penis sans sans_au scarf skeleton tagme underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction

blue_blushblue_eyes

2d alternate_universe animated_skeleton anthro artist_name blush cum cumming dream_sans dream_sans_(fan_character) dreamtale fan_character heart heki_(artist) humanoid ink_sans_(fan_character) inktale lightsaber_dick male male_only on_top_of_another penis sans sans_au sanscest sex skeleton tagme underswap underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction white_background

alternate_universeanimated_skeleton

blue_penis blush brothers ectopenis glowing_cum incest irrumatio male male_only orange_tongue papyrus_(underswap) penis penis_in_mouth sans sans_au skeleton tired_but_horny_(artist) underswap underswap_papyrus underswap_sans undertail undertale undertale_au

blue_penisblush

alternate_universe animal_humanoid anthro bodily_fluids clothing cock_pointing_towards_viewer cum cum_on_screen cum_on_viewer cumming_on_viewer erection fish fish_humanoid futa_only futanari genital_fluids genitals gloves gradient_background group handwear herm humanoid intersex looking_at_viewer marine marine_humanoid multiple_futa nude penis penis_pointing_toward_viewer penis_towards_viewer presenting presenting_penis siamkhan standing submissive_pov swapfell taker_pov underfell underswap undertale undertale_(series) undertale_au undyne undyne_(swapfell) undyne_(underfell) undyne_(underswap) undyne_au

alternate_universeanimal_humanoid

2018 2boys 2d bandana black_sclera black_sweatpants blowjob blue_bandana blue_blush blue_eyes blue_scarf cum cum_in_mouth cum_inside ectopenis fellatio hands_in_sleeves heart-shaped_pupils hoodie humanoid incest ksuriuri looking_up looking_up_at_partner male male_only oral orange_hoodie orange_penis papyrus papyrus_au penis sans sans_au scarf sex skeleton slight_blush sucking sweatpants underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction unseen_male_face yaoi

bandanablack_sclera

1boy 1femboy ass_focus bodysuit clapping_cheeks disdust dusttrust dusttrust_sans english_text fat_ass femboy flower_crown huge_ass immoria looking_at_viewer looking_down male male_focus male_only not_a_skeleton_but_a_deformity papyrus_(underswap) parkretura sans scarf solo text thebushmenace thighhighs twerking underswap undertale_au varmixtale

ass_focusbodysuit

1girls 2021 2boys ambiguous_penetration arm_grab artist_name ass_grab bandana black_sclera blue_bandana blue_blush blue_body blue_scarf blush blushing ectobody elysiansins female female_sans gloves heart male red_body sans sans_(underfell) sans_(underswap) sanscest scar scarf scars selfcest simple_background skeleton solid_color_background spitroast squeezing_butt thrusting underfell underfell_sans underswap underswap_sans undertale undertale_au undertale_fanfiction undertale_sans watermark yaoi

ambiguous_penetrationarm_grab

2025 absurd_res alternate_universe animated_skeleton artist_name ass bent_over blue_body blue_clothing blue_eyes bluesky_logo bone breasts clothing deviantart deviantart_logo ectobody ectobutt english_text eyelashes female female_sans genderswap genderswap_(mtf) hi_res hip_sway looking_back motion_lines mtf_crossgender newgrounds_logo rear_view rule_63 sans sans_(underswap) skeleton solo sound_effects starstar000 starverstar000 text thiccberry undead underswap undertale undertale_au white_text

absurd_resalternate_universe

2d 3boys blowjob bondage comic cum cum_in_mouth cum_in_pants cum_inside cum_on_face english_text fellatio forced_to_watch gay gay_sex helpless humanoid incest ksuriuri male male/male male_only papyrus_(underfell) papyrus_(underswap) papyrus_au sans sans_(underswap) sans_au talking text underfell underfell_papyrus underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction yaoi

2019 3boys balls black_hoodie blowjob blue_balls blue_blush blue_dick blue_eyes blue_hoodie blue_penis blue_pupils blue_tongue bodily_fluids cum cum_in_mouth cum_on_tongue fellatio gay genital_fluids hands_in_pockets heart hearts hoodie humanoid_penis lizheru lizherubones male male/male meta_request penis red_penis sans sans_blush sans_eye sans_glowing_eye sans_penis sanscest selfcest skeleton square_crossover star-shaped_pupils starry_eyes text trio underfell underfell_sans underswap underswap_sans undertale undertale_au undertale_fanfiction video_games

ballsblack_hoodie

2boys 2d abosinsin alternate_universe animated_skeleton big_dom_small_sub blush color english_text face_out_of_frame gay incest male male_only moaning monster monster_boy papyrus papyrus_au sans sans_au sex skeleton sweat tagme tears text tongue_out tugging_clothing twitching underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au

abosinsinalternate_universe

2boys anal gay incest male male/male male_only papyrus rape sans underfell underfell_papyrus underswap underswap_sans undertale undertale_au undertale_fanfiction

3girls barista big_breasts breasts error_sans_(fan_character) female female_only female_sans nightmare_sans sans sans_(underswap) sans_au sanscest tagme underswap underswap_sans undertale_au

baristabig_breasts

2016 blush bone clothed clothed_sex clothing colored_cum cum cum_on_face cum_on_hand cum_on_tongue english_text glowing glowing_eyes heart implied_incest incest nsfwshamecave sans sans_au sex skeleton tagme text tongue tongue_out undead underfell underfell_sans underlust underlust_sans underswap underswap_sans undertale undertale_au undertale_fanfiction undertale_sans unusual_cum

1girls 2d acidd_grrs biting_lip blush breasts color cum_in_pussy dialogue ectobody english english_text female female_sans genderswap genderswap_(mtf) heart incest male male_penetrating naked_female nude_female papyrus papyrus_au penis pussy rule_63 sans sans_au skeleton sweat tagme text uncensored uncensored_breasts uncensored_penis uncensored_vagina underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au

acidd_grrsbiting_lip

2d color ectopenis error_sans error_sans_(fan_character) errortale male maten penis sans sans_au sanscest tagme underswap underswap_sans undertale undertale_(series) undertale_au voodoo voodoo_penetration voodoo_sex

2020 2020s 2d ? alternate_universe animated_skeleton artist_name blue_eyes blush confused confused_look confusion dream_sans dream_sans_(fan_character) dreamtale ectoplasm error_sans error_sans_(fan_character) errortale heki_(artist) humanoid ink_sans ink_sans_(fan_character) inktale male male/male male_only mars_symbol pulling_up_shirt sans sans_au sex_toy skeleton spoken_question_mark star_eyes underswap underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction yaoi

?alternate_universe

2boys 2d alternate_universe animated_skeleton blue_eyes blue_tongue blush bonetrouble ectopenis gloves heart-shaped_pupils heart_eyes humanoid incest licking licking_penis male male/male male_only male_pov non-human offscreen_character offscreen_male orange_penis papyrus_au penis pov sans sans_au scarf sex skeleton small_fangs star_eyes star_shaped_pupils tongue tongue_out toony underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction

alternate_universeanimated_skeleton

breasts female female_sans genderswap rule_63 sans sans_au the_absolute thighhighs thighs underswap underswap_sans undertale_au

1boy 1girls 2d artist_request bed bedroom blush breasts cat chara english_text female furry game_ui glowing_eyes humanoid male male_chara pixel_art sex size_difference small_breasts smaller_female sprite_art sweat talking temmie_(undertale) text text_box ts_underswap underswap undertale undertale_(series) undertale_au

artist_requestbed

2d 2d_(artwork) after_sex after_vaginal ahe_gao alternate_universe animated_skeleton cum cum_in_pussy cum_inside ectobody ectopussy female grabbing_sheets kriskimarts leaking_cum leaking_pussy male male/female on_bed pink_body pink_pussy pussy rule_63 sans sans_au sanscest skeleton straight torn_clothes torn_clothing underlust underlust_sans underswap underswap_sans undertale undertale_(series) undertale_au

after_sexafter_vaginal

2025 absurd_res alternate_universe animated_skeleton artist_name ass bent_over blue_body blue_clothing blue_eyes bluesky_logo bodily_fluids bone breasts clothing deviantart deviantart_logo ectobody ectobutt english_text eyelashes female female_sans genderswap genderswap_(mtf) hi_res looking_back mtf_crossgender newgrounds_logo rear_view rule_63 sans sans_(underswap) sans_au skeleton solo starstar000 starverstar000 sweat sweatdrop text thiccberry undead underswap undertale undertale_au white_text

absurd_resalternate_universe

2018 2d 3boys alternate_universe animated_skeleton blue_penis blush bodily_fluids bone bottomwear brother brothers clothing color cunnilingus cuntboy cuntboy_sans_balls footwear gay genital_fluids genitals gloves group handwear herm hermaphrodite humanoid incest intersex kerchief licking male male/male male_on_maleherm maleherm multi_genitalia oral orange_tongue papyrus papyrus_(underfell) papyrus_(underswap) penile penis penis_lick precum pussy red_penis sans sans_(underswap) scarf sex sibling simple_background skeleton theyaois_(artist) threesome tongue tongue_out topwear trio uncensored undead underfell underswap undertale undertale_(series) undertale_au yaoi

alternate_universeanimated_skeleton

2d artist_request blush cum cumming dream_sans dream_sans_(fan_character) dreamtale error_sans_(fan_character) errortale heart holding_legs_up humanoid ink_sans_(fan_character) inktale male male/male sans sans_au sanscest sex strings tagme tagme_(artist) tears tied underswap underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction

artist_requestblush

2019 2boys 2d artist_name bandana black_sweatpants blue_bandana blue_blush blue_eyes blue_scarf bone ectopenis grumpy grumpy_sub hoodie hugging_penis humanoid incest lizheru lizherubones male male/male male_only orange_hoodie orange_penis papyrus_au penis sans sans_au scarf shoulder_pads simple_background skeleton solo_focus starry_eyes sweatpants text underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au undertale_fanfiction unseen_male_face white_background

artist_namebandana

1girls breasts female female_sans genderswap gijinka humanized large_breasts rule_63 sans sans_(underswap) sans_au spookdx tagme thighhighs thighs underswap underswap_sans undertale_au white_background white_hair

2d 3girls alternate_universe animated_skeleton big_breasts blue_body blue_eyes boner_blossom breasts brown_scarf color dream_sans dream_sans_(fan_character) dreamtale dreamtale_(undertale_fanfiction) dreamtale_au ectobody ectobreasts fan_character female female_only female_sans genderswap ink_sans ink_sans_(fan_character) inktale multiple_girls nipples rainbow_body rule_63 sans sans_(underswap) sans_au scarf skeleton small_breasts smile smiling tagme uncensored underswap underswap_sans undertale undertale_(series) undertale_au upper_body yellow_body yellow_eyes

alternate_universeanimated_skeleton

3boys anal anal_insertion anal_sex blowjob cum_in_ass cum_in_pussy cum_inside double_penetration female male pussy sans sans_au sanscest skeleton swapfell underfell underfell_sans underswap underswap_sans undertale undertale_au vaginal_insertion vaginal_penetration vaginal_sex

analanal_insertion

breasts ectobody ectobreasts female female_only female_sans huge_ass huge_breasts rule_63 sans the_absolute thiccberry underswap underswap_sans undertale undertale_au video_game video_games

breastsectobody

2d alternate_universe animated_skeleton blue_eyes breasts cross_sans cross_sans_(fan_character) dialogue dream_sans_(fan_character) ectobody ectobreasts female heart ink_sans_(fan_character) inktale male male_penetrating_female rule_63 sans sans_au sanscest simple_background skeleton tagme themimii1 thick twitter_username underswap underswap_sans undertale undertale_(series) undertale_au yellow_eyes

alternate_universeanimated_skeleton

2d 3boys english_text forced_yaoi humanoid imminent_rape imminent_sex incest male male_only papyrus papyrus_(underswap) papyrus_au rape robot_kin sans sans_au sanscest selfcest skeleton spitroast tagme talking text underfell underfell_sans underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction

english_textforced_yaoi

1girls 2d 5_fingers acidd_grrs blue_gloves blush color dialogue english english_dialogue english_text female female_sans fully_clothed genderswap genderswap_(mtf) gloves hard_on heart incest legs_held_open papyrus papyrus_au rule_63 sans sans_au scarf skeleton tagme text underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au watermark why

acidd_grrsblue_gloves

4girls 5_eyes 6_arms animal_humanoid anthro anthro_only arachnid areola arthropod boss_monster breasts caprine crown dead_source dildo feet fel-fisk female female/female female/female/female/female female_only fur goat group group_sex hi_res humanoid mammal muffet multi_arm multi_eye multi_limb non-mammal_breasts penetration piercing purple_skin pussy red_eyes saliva sex sex_toy simple_background sinisk size_difference spider spider_humanoid square_crossover tongue toriel toriel_(underfell) underfell underswap underswap_toriel undertale undertale_au undertale_fanfiction vaginal_penetration video_games white_fur yuri

animal_humanoidanthro

2boys 2d collar color dialogue ectobody ectopenis english english_dialogue english_text gay leash leash_and_collar leash_pull male male/male male_only penis red_body red_penis sans sans_au sanscest spiked_collar submissive_male talking text underfell underfell_sans underswap underswap_sans undertale undertale_(series) undertale_au yaoi

2boys ass big_ass big_butt blush butt comic_page cunnilingus femboy gay incest male papyrus sans sharp_teeth split_tongue underfell underfell_papyrus underswap underswap_sans undertale undertale_au undertale_fanfiction yaoi

1boy 1girls 2d blush duo eating_pussy female ghostskeleto glasses male male/female muffet papyrus pussy sex skeleton spider_girl tagme underswap underswap_muffet underswap_papyrus undertale undertale_(series) undertale_au

alternate_universe alterswap alterswap_toriel altertale altertale_au big_breasts breasts closed_eyes clothed clothing female female_only friisans gloves happy keyhole mask masked_female solo toriel toriel_au underswap undertale undertale_(series) undertale_au undertale_fanfiction white_background wink

alternate_universealterswap

2boys 2d blue_body dog_ears dog_tail ectobody english_text humanoid incest male mellednsfw orange_body papyrus papyrus_(underswap) papyrus_au penetration sans sans_(underswap) sans_au sex tagme tail_wagging talking text text_bubble underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction wagging_tail yaoi

blue_bodydog_ears

alternate_universe animated_skeleton bone brother brothers duo ectopenis glowing_penis hi_res humanoid incest lizheru lizherubones male male_only oral papyrus papyrus_(underswap) papyrus_au penis sans sans_(underswap) sans_au sex sibling skeleton solo_focus television undead underswap underswap_papyrus underswap_sans undertale undertale_au undertale_fanfiction video_games

alternate_universeanimated_skeleton

ahe_gao blue_body blue_penis blush brosboning drool drooling ectobody gay handjob incest jerkingoff_another lightsaber_dick male male_only masturbating_other papyrus papyrus_(underswap) papyrus_au partially_clothed penis sans sans_(underswap) sans_au sitting_on_lap skeleton sweat text tongue_out underswap underswap_papyrus underswap_sans undertale_au

ahe_gaoblue_body

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