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1boy colored_sclera dark grin heart highres hollow_eyes hollow_mouth long_sleeves male_focus monochrome nsio open_mouth shirt simple_background skeleton smile solo sweater teeth turtleneck undertale uneven_eyes w.d._gaster wingdings

colored_scleradark

3boys black_sclera colored_sclera english_text father's_day food grin male_focus multiple_boys papyrus_(undertale) pasta sans_(undertale) skeleton smile tama_(tamafuku08) teeth throwing throwing_food undertale w.d._gaster white_background white_eyes

black_scleracolored_sclera

3boys aged_down ahin_vpv baby black_sclera camera coat colored_sclera grin holding holding_camera male_focus multiple_boys papyrus_(undertale) red_scarf sans_(undertale) scarf sitting skeleton smile teeth toy undertale w.d._gaster white_coat white_eyes

aged_downahin_vpv

1boy ascot blood blood_on_clothes cape capelet coat coat_on_shoulders collared_shirt cowboy_shot english_text greyscale highres lapels lina_gtk long_sleeves monochrome multiple_views notched_lapels pants shirt simple_background undertale vest w.d._gaster

1boy absurdres deltarune gangster gyate_gyate highres hole_in_hand hollow_eyes hollow_mouth long_sleeves looking_at_viewer meganosuke shirt skeleton smile stigmata striped_clothes striped_shirt striped_sweater sweater turtleneck undertale uneven_eyes w.d._gaster

absurdresdeltarune

1boy belt blue_jacket blue_skin colored_skin commentary_request deltarune fusion hair_over_one_eye jacket long_hair long_sleeves looking_at_viewer melting open_mouth rouxls_kaard smile solo taharu_(papiyas) turtleneck turtleneck_jacket undertale upper_body w.d._gaster white_belt white_hair wind

beltblue_jacket

1boy 1other ? ahoge animated animated_gif arms_at_sides astigmatism_(undertale) ball bandaid bandaid_on_cheek bandaid_on_face black_pantyhose bob_cut boots brown_hair closed_eyes commentary dogamy english_commentary flower frisk_(undertale) full_body grey_shorts heart holding holding_stick no_mouth outline pantyhose pink_sweater purple_footwear purple_sweater sandragh short_shorts shorts signature simple_background snowdrake's_mother solo_focus standing stick sweater turtleneck turtleneck_sweater two-tone_sweater undertale w.d._gaster watermark web_address white_outline

2boys :d allhailjotman arm_up black_jacket black_shorts blue_skin buttons clown clown_boy colored_skin colored_tongue commentary deltarune disembodied_hand english_commentary frilled_sleeves frills full_body gloves green_footwear hat highres holding_hands hollow_eyes jacket jester jester_boy jester_cap jevil juliet_sleeves long_sleeves looking_at_viewer male_focus multiple_boys neck_ruff open_clothes open_jacket open_mouth pointy_ears puffy_shorts puffy_sleeves purple_gloves purple_shirt purple_tongue scar scar_across_eye scar_on_face sharp_teeth shirt shorts simple_background smile standing straight-on teeth tongue two-tone_hat undertale w.d._gaster waving yellow_teeth

:dallhailjotman

... 2others 3boys absurdres androgynous angry animal animal_on_head arms_up asriel_dreemurr back bird bird_on_head blood blush_stickers bone candy chara_(undertale) character_name chibi chocolate chocolate_bar closed_eyes collared_sweater cookie copyright_name crying drooling eating english_text expressionless flowey_(undertale) food frisk_(undertale) furry furry_male ghost grin hands_in_pockets heart_pendant highres holding holding_knife injury jacket knife monochrome multiple_boys multiple_others multiple_views on_head open_clothes open_jacket open_mouth plant potted_plant sans_(undertale) shaded_face short_hair skeleton smile speech_bubble striped_clothes striped_sweater sweat sweater tadeno tears undertale upper_body w.d._gaster white_background

1boy 1girl animal_ears annoying_dog blush bone box branch breasts cardboard_box christmas_stocking commentary curtains english_commentary english_text gameplay_mechanics gloves grey_hair gun highres indoors leaning_forward looking_at_viewer magnifying_glass off_shoulder personification picture_frame potion shelf shirt socks striped_clothes striped_shirt striped_sweater sweat sweater sword tail temmie trash_can undertale w.d._gaster weapon white_fur yagi_(mike_no_hito)

animal_earsannoying_dog

6+boys 6+girls :3 aaron_(undertale) absolutely_everyone aircraft airplane alphys annoying_dog asgore_dreemurr bratty_(undertale) building burgerpants castle catty_(undertale) chara_(undertale) character_request city cityscape cloud confetti dog doggo_(undertale) dummy_(undertale) everyone flowey_(undertale) flying frisk_(undertale) from_above furry furry_female furry_male gerson gradient_sky grillby highres horizon houten_(dre_a_mer) lesser_dog mad_dummy_(undertale) mettaton monster_kid_(undertale) muffet multiple_boys multiple_girls napstablook nice_cream_guy on_roof onionsan outdoors papyrus_(undertale) pink_sky politics_bear royal_guard_01_(undertale) royal_guard_02_(undertale) sans_(undertale) scenery sky snowdin_shopkeeper sun sunset temmie toriel tower undertale undyne vulkin w.d._gaster watchtower

:3aaron_(undertale)

2boys 3girls annoying_dog berdly_(deltarune) berdly_(deltarune)_(cosplay) black_hair black_skirt black_wings blue_hair commentary cosplay deltarune dog dress english_commentary english_text feathered_wings frog_hair_ornament full_body gap_(touhou) geta glasses green_hair grin hair_ornament hat hauchiwa heterochromatic_eyewear highres kochiya_sanae looking_at_viewer multiple_boys multiple_girls noelle_holiday noelle_holiday_(cosplay) pink-tinted_eyewear red_footwear red_hat redinthesea scouter shameimaru_aya shirt simple_background skirt smile snake_hair_ornament spamton_g._spamton standing tengu-geta tenkyuu_chimata tenkyuu_chimata_(cosplay) tinted_eyewear tokin_hat touhou undertale w.d._gaster white_background white_dress white_shirt wings yakumo_yukari yellow-tinted_eyewear zun

annoying_dogberdly_(deltarune)

1boy 4girls absurdres black_hair black_hat blue_hair blush brown_hair chara_(undertale) chibi closed_eyes collar crossover doki_doki_literature_club drooling english_text finger_to_mouth flowey_(undertale) frilled_collar frilled_sleeves frills green_hair hat highres holding holding_knife index_finger_raised knife komeiji_koishi light_bulb looking_ahead looking_at_viewer madotsuki mouth_drool multiple_girls omori open_mouth red_hair ribbon shirt smile third_eye touhou undertale w.d._gaster yellow_ribbon yellow_shirt yume_nikki yuri_(doki_doki_literature_club) zunusama

absurdresblack_hair

21_ke 2boys ankle_socks behind_another black_jacket black_shorts blue_eyes blue_jacket bone commentary_request constricted_pupils crazy_grin eye_socket full_body glowing glowing_eye gradient_background grey_background grin hand_on_another's_face hand_on_another's_neck hood hood_down hooded_jacket horror_(theme) hug hug_from_behind jacket long_sleeves looking_at_viewer loose_socks magic multiple_boys open_clothes open_jacket outstretched_arm outstretched_hand partial_commentary pink_slippers reaching reaching_towards_viewer sans_(undertale) shorts skeleton slippers smile socks standing tentacles undertale w.d._gaster white_socks

ankle_socksbehind_another

3boys ? artist_name bed bib blue_jacket blue_pajamas blush brothers child closed_eyes crying cup family father_and_son feeding food fork gloves hat highres holding holding_cup holding_fork holding_spoon hood hood_down hooded_jacket indoors jacket korokor59513559 looking_at_another lying male_focus memories multiple_boys on_bed on_side open_mouth pajamas papyrus_(undertale) pillow plate red_gloves sans_(undertale) shirt siblings skeleton sleeping smile spoon streaming_tears tears teeth twitter_username undertale w.d._gaster white_shirt

3boys apron blue_apron blue_jacket blue_pajamas blush brothers closed_eyes cooking eating father_and_son hat holding holding_spoon jacket korokor59513559 looking_at_another male_focus multiple_boys pajamas papyrus_(undertale) plate red_apron red_scarf sans_(undertale) scarf siblings skeleton smile spoon teeth undertale w.d._gaster

apronblue_apron

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_(undertale) 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

artist_nameblack_pants

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_(undertale) shorts siblings skeleton spatula sweat teeth twitter_username undertale w.d._gaster

black_pantsblack_shorts

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_(undertale) shirt siblings skeleton smile streaming_tears tears teeth twitter_username undertale w.d._gaster white_shirt

apronblue_apron

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_(undertale) shirt siblings skeleton smile teeth undertale w.d._gaster white_shirt

apronblue_jacket

black_cloak blue_eyes cloak eye_contact grey_background highres hood hood_down horror_(theme) leaning_forward long_sleeves looking_at_another phantomreturn ribs sans_(undertale) skeleton skull teeth undertale w.d._gaster yellow_eyes

black_cloakblue_eyes

1other absurdres colored_sclera crossover cyberlord1109 deltarune evil_grin evil_smile extra_eyes facing_viewer father_(fma) flower fullmetal_alchemist grin gun hand_tentacles highres holding holding_gun holding_weapon hole_on_body hollow_eyes hollow_mouth kaonashi long_sleeves looking_at_viewer mask no_humans red_eyes sen_to_chihiro_no_kamikakushi skeleton smile standing studio_ghibli turtleneck undertale uneven_eyes w.d._gaster weapon white_eyes

absurdrescolored_sclera

1boy black_coat coat extra_faces hole_in_hand hole_on_body hollow_eyes hollow_mouth leaning_forward long_sleeves open_mouth simple_background smile undertale upper_body w.d._gaster white_background yunsan_wu_xiao

aqua_shirt black_jacket brown_hair chair closed_eyes cup frisk_(undertale) from_above highres hospital hospital_gown jacket saliva shirt short_hair sitting sitting_on_lap sitting_on_person skeleton soseji_(tjduswjd) spoilers teacup undertale w.d._gaster

aqua_shirtblack_jacket

bad_id bad_twitter_id bendy bendy_and_the_ink_machine character_request copyright_request crossover deemo deemo_(character) enderman faceless five_nights_at_freddy's formal_clothes friday_night_funkin' full_body grin highres indoors kneehighs minecraft monster_(friday_night_funkin') mugaiii700 on_one_knee sekomumasada_sensei slender_man smile socks squatting standing suit tile_floor tiles trait_connection undertale w.d._gaster yume_nikki

bad_idbad_twitter_id

1other 2boys ambiguous_gender berdly_(deltarune) brown_hair cup_ramen deltarune food furry highres houten_(dre_a_mer) instant_ramen kris_(deltarune) multiple_boys noodles panicking pouring ramen short_hair striped_clothes striped_sweater surreal sweater tea teapot w.d._gaster

ambiguous_genderberdly_(deltarune)

2boys absurdres alley artist_request black_footwear black_hair black_jacket blush brick_floor city colored_skin dark deltarune full_body glasses grin hair_slicked_back highres holding holding_phone jacket light long_nose long_sleeves male_focus multiple_boys night night_sky pants phone pointy_nose round_eyewear shadow short_hair sky smile spamton_g._spamton star_(sky) starry_sky suit_jacket talking_on_phone tinted_eyewear undertale w.d._gaster walking white_pants white_skin

1other bad_id bad_twitter_id brown_hair brown_shorts chara_(undertale) commentary english_commentary from_behind highres horror_(theme) long_sleeves open_mouth short_hair shorts sitting spring_rider striped_clothes striped_sweater sweater undertale unnecessa_ry w.d._gaster

bad_idbad_twitter_id

1boy 1girl amputee androgynous bdsm blood bob_cut bowl brown_hair chara_(undertale) character_name closed_eyes eyeball frisk_(undertale) guro hollow_eyes missing_tooth open_mouth pet_bowl sans_(undertale) shirt short_hair shorts shousan_(hno3syo) skeleton smile striped_clothes striped_shirt sweater translation_request undertale vomiting w.d._gaster

amputeeandrogynous

1other artist_name cage cape colored_skin deltarune fangs gloves glowing glowing_eye hat jester_cap jevil maa_tc open_mouth pointy_ears red_eyes stigmata sweatdrop w.d._gaster white_gloves white_skin

artist_namecage

1other black_cloak cloak colored_skin dark_background facing_away flower grass light_rays maa_tc no_humans solo standing stigmata undertale w.d._gaster white_skin wide_sleeves yellow_flower

black_cloakcloak

1boy androgynous binary brown_footwear brown_hair carrying city code frisk_(undertale) glowing glowing_eye houten_(dre_a_mer) open_mouth pointing shirt skeleton smile striped_clothes striped_shirt sweat undertale w.d._gaster

androgynousbinary

blush carpet commentary crossover cup full_body grey_background holding lamp madcookiefighter missingno. multiple_crossover nintendo pokemon pokemon_(creature) pokemon_rgby sitting smile sweatdrop table teacup trait_connection uboa undertale w.d._gaster yume_nikki

animal animated animated_gif annoying_dog brown_hair cosplay dav-19 day dog facial_tattoo flower frisk_(undertale) grass headband lowres mononoke_hime outdoors plant san_(cosplay) san_(mononoke_hime) tattoo transparent_background tree undertale w.d._gaster

:3 :d alphys annoying_dog asgore_dreemurr asriel_dreemurr bad_id bad_tumblr_id black_hair brown_hair cape chara_(undertale) closed_eyes eye_contact facing_viewer flowey_(undertale) food frisk_(undertale) frown furry glasses goat_girl grin hair_over_one_eye hands_in_pockets heart horns jacket knife looking_at_another mary_cagle meatball mettaton mettaton_ex monster_kid_(undertale) napstablook open_mouth orange_scarf own_hands_together papyrus_(undertale) pasta plate red_cape red_hair sans_(undertale) scarf sharp_teeth shirt slippers smile spaghetti striped_clothes striped_shirt tail teeth temmie toriel undertale undyne w.d._gaster

1boy 3girls aged_down blush breasts cleavage comic gender_request genderswap genderswap_(mtf) large_breasts legs monochrome multiple_girls one_eye_closed personification ponytail short_hair sitting standing translation_request undertale w.d._gaster white_background wink

2boys =) arm_up artist_name bano_akira blue_footwear crack ghost glowing hand_in_pocket hollow_eyes hood hoodie looking_at_another looking_down multiple_boys one_eye_closed open_mouth sans_(undertale) screen shoes shorts signature skeleton smile sneakers standing transparent undertale w.d._gaster

absurdres alphys annoying_dog asgore_dreemurr asriel_dreemurr burgerpants dogamy dogaressa doggo flowey_(undertale) greater_dog grillby highres k.blank lesser_dog mad_dummy_(undertale) mettaton mettaton_ex monster_kid_(undertale) napstablook papyrus_(undertale) photoshop_flowey royal_guard_01_(undertale) royal_guard_02_(undertale) sans_(undertale) temmie toriel undertale undyne w.d._gaster

absurdresalphys

alphys androgynous annoying_dog arm_around_shoulder asgore_dreemurr asriel_dreemurr barefoot black_hair blush brown_hair cape chara_(undertale) closed_eyes copyright_name crown eyepatch flowey_(undertale) food frisk_(undertale) furry furry_male gender_request heart lying mettaton mettaton_ex monster_boy monster_kid_(undertale) napstablook on_back open_mouth papyrus_(undertale) pasta ponytail red_cape red_footwear red_hair robe sans_(undertale) shirt shoes shorts smile sosoa spaghetti standing striped_clothes striped_shirt tail tail_wagging temmie toriel undertale undyne w.d._gaster

alphysandrogynous

1girl absurdres breasts female_focus gender_request genderswap genderswap_(mtf) gradient_background highres kaxlene solo tagme undertale w.d._gaster

absurdresbreasts

1boy :3 bad_id bad_pixiv_id chibi colored_skin grey_background greyscale gyate_gyate lowres male_focus monochrome open_mouth portrait ribbed_sweater simple_background smile solo sweater turtleneck undertale uneven_eyes upper_body w.d._gaster white_skin yaruky

1girl 3boys alternate_universe bete_noire big_ass big_breasts blue_eyes brown_hair glitchtale glowing_eyes huge_ass huge_breasts humiliation hyper karmatic looking_at_viewer meme papyrus_(undertale) pink_hair pointing pointing_soyjak purple_eyes rape sans_(undertale) skeleton soyjak undertale undertale_(series) undertale_au w.d._gaster

alternate_universebete_noire

1boy 1girl 2023 2d animated_skeleton artist_name artist_watermark blue_breasts blue_nipples blue_tongue bottom_sans breasts clothed clothed_male clothing cum cum_on_face digital_media duo ech7474 ectopenis female_sans genderswap genderswap_(mtf) genitals gloves hooded_jacket hoodie humanoid jacket licking licking_face licking_penis long_tongue male male/female monster multiple_views nipples nude off_shoulder orange_penis paizuri penis purple_background sans_(undertale) sanster sex simple_background skeleton solid_color_background sweater tears tongue tongue_out top_gaster undead undertale undertale_(series) video_game_character video_games w.d._gaster watermark white_gloves

animated_skeletonartist_name

2016 2boys 2d animated_skeleton arms_behind_back artist_name beoteono black_tentacles blue_blush blue_penis blush bodily_fluids bottom_sans buttercupsticks clothed clothing digital_media dominant dominant_male drooling duo ectopenis feet_out_of_frame fluids grabbing_another's_chin grabbing_chin grey_background hand_under_chin hands_behind_back humanoid male male/male male_focus male_only maledom malesub monster one_eye_closed partially_colored penis precum profanity sans_(undertale) sanster simple_background skeleton soul soul_sex submissive submissive_male tentacle tentacle_on_male tentacles tentacles_around_legs tentacles_on_male text top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonarms_behind_back

2017 2d 4boys animated_skeleton blue_blush blue_tongue blush bottom_sans bukkake clothed clothing cum cum_in_mouth cum_on_tongue digital_media ectotongue fangs finger_in_mouth fontcest gangbang grillby grillsans hand implied_incest lowest-of-dirt male male/male male_focus male_only monster multiple_boys one_eye_closed orange_cum orange_penis papyrus_(undertale) papysans penis red_background sans_(undertale) sanster sex skeleton solo_focus tongue top_gaster top_grillby top_papyrus undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body video_game_character video_games w.d._gaster yaoi

animated_skeletonblue_blush

1boy 1cuntboy 2017 2d ??? anal anal_fisting animated_skeleton anus black_and_white bottom_sans clitoris comic comic_page comic_panel cuntboy digital_media double_penetration drooling ectopussy edit english_text fingers_in_pussy fisting fisting_pussy grabbing_mouth humanoid large_filesize long_image male male/cuntboy monochrome monster mouth_held_open multiple_hands nczhhdyb pants_pulled_down pants_pulling pussy pussy_juice sans_(undertale) sanster sequential skeleton solo_focus spoken_heart spoken_question_mark spread_anus spread_pussy tears text third-party_edit tongue tongue_out top_gaster uncensored undead undertale undertale_(series) urethra vaginal vaginal_fisting video_games w.d._gaster wet_pussy yaoi

1boy 1cuntboy 2017 2d ??? anal anal_fisting animated_skeleton anus black_and_white bottom_sans clitoris comic comic_page comic_panel cuntboy digital_media double_penetration drooling ectopussy edit english_text fingers_in_pussy fisting fisting_pussy grabbing_mouth large_filesize long_image male male/cuntboy monochrome monster mouth_held_open multiple_hands nczhhdyb pants_pulled_down pants_pulling pussy pussy_juice sans_(undertale) sanster sequential skeleton solo_focus spoken_heart spoken_question_mark spread_anus spread_pussy tall_image tears text third-party_edit tongue tongue_out top_gaster uncensored undead undertale undertale_(series) urethra vaginal vaginal_fisting video_games w.d._gaster wet_pussy yaoi

1boy 2d arm_support aroused artist_name bad_id bad_tumblr_id black_clothing blush bulge clothed clothed_male digital_media english_text erection erection_under_clothes floor giaru_(artist) hand_on_own_crotch humanoid looking_down male male_focus male_only monster on_floor sitting solo solo_male text third-party_source tumblr_username undertale undertale_(series) video_games visible_breath w.d._gaster wingdings

arm_supportaroused

2boys 2d ahegao animated_skeleton artist_request blue_tongue blush bottom_sans crying_with_eyes_open digital_media dominant_pov english_text fangs hands hands_behind_head male male/male male_ahegao male_focus male_only moan monster multiple_hands pleasure_face pov sans_(undertale) sanster skeleton solo_focus text tongue tongue_out top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

ahegaoanimated_skeleton

1boy 1cuntboy 2017 2d anal anal_fisting animated_skeleton anus black_and_white bottom_sans clitoris comic comic_page comic_panel cuntboy digital_media double_penetration drooling ectopussy fisting fisting_pussy grabbing_mouth humanoid male male/cuntboy monochrome monster mouth_held_open multiple_hands nczhhdyb pussy sans_(undertale) sanster sequential skeleton solo_focus tears tongue tongue_out top_gaster uncensored undead undertale undertale_(series) vaginal vaginal_fisting video_games w.d._gaster yaoi

analanal_fisting

1boy 1cuntboy 2017 2d ??? animated_skeleton anus black_and_white bottom_sans clitoris comic comic_page cuntboy digital_media ectopussy fingers_in_pussy humanoid male male/cuntboy monochrome monster multiple_hands nczhhdyb pants_pulled_down pants_pulling pussy pussy_juice sans_(undertale) sanster sequential skeleton solo_focus spoken_heart spoken_question_mark spread_anus spread_pussy top_gaster uncensored undead undertale undertale_(series) urethra video_games w.d._gaster wet_pussy yaoi

???animated_skeleton

1:1 1:1_aspect_ratio 2boys 2d animated_skeleton blue_blush blue_tongue bottom_sans daron9 digital_media fur_trim humanoid implied_penetration implied_sex korean_text male male_focus male_only monster sans_(undertale) sanster skeleton solo_focus text tongue tongue_out top_gaster undead undertale undertale_(series) unseen_male_face video_games w.d._gaster yaoi

animated_skeletonblue_blush

2015 2boys 2d animated_skeleton black_background blue_blush blush bottom_sans clothed digital_media duo groping hand hand_on_crotch hands humanoid male male_only monster multiple_hands sans_(undertale) sanster shirt_up skeleton solo_focus suckmytrombone sweater top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonblack_background

2018 2boys 2d animated_skeleton ass_slap ass_spanking bottom_sans completely_nude crying digital_media grabbing_sheets gripping_sheets hand humanoid monster nude pf-pro-fucker sans_(undertale) skeleton slapping slapping_butt solo_focus spanking spanking_ass spanking_butt tears trembling undead undertale undertale_(series) unseen_character w.d._gaster yaoi

animated_skeletonass_slap

2022 2d animated_skeleton arm_grab bad_id bad_twitter_id black_and_white bottom_sans clothed covering_mouth digital_media fingering fingering_another fingering_partner grabbing_arm grabbing_hand hand hand_grab hand_on_mouth hands humanoid inactive_account male male_focus male_only monochrome monster monster_boy multiple_hands non-con non-consensual noncon nonconsensual pants_pull pants_pulled_down sans_(undertale) sanster shirt_lift shirt_pull shirt_up simple_background skeleton socks_on solo_focus top_gaster toubigaizi undead undertale undertale_(series) undressing unseen_character unseen_male_face video_game_character video_games w.d._gaster white_hair yaoi

animated_skeletonarm_grab

2016 2boys 2d animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male black_body black_penis black_tentacles blue_blush blue_body blue_penis blue_tongue blush bottom_sans bottomless clothed digital_media drooling ectobody ectopenis ectoplasm goo grabbing_chin grabbing_face grabbing_own_penis gradient_background grey_background half-closed_eyes holding_own_penis hooded_jacket hoodie humanoid jacket larger_male male male/male male_only maledom malesub partially_clothed partially_nude penis precum safetytrance sans_(undertale) sanster skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom sweat tentacle tentacle_on_male tentacle_under_clothes tentacles tentacles_around_arms tentacles_around_legs tentacles_on_male tongue tongue_out undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonbigger_dom

2016 2boys 2d animated_skeleton artist_request bigger_dom bigger_dom_smaller_sub bigger_male bottom_sans completely_nude digital_media height_difference humanoid kissing larger_male male nude sans_(undertale) sanster simple_background skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonartist_request

2boys 2d animated_skeleton bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_tongue bottom_sans digital_media english_text from_behind heart-shaped_pupils heart_eyes height_difference humanoid humanoid_penetrating larger_male larger_penetrating larger_penetrating_smaller male male_focus male_only male_penetrating monochrome nude one_eye_closed penetration sans_(undertale) sanster sex sex_from_behind skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom tesno204 text tongue tongue_out top_gaster topless topless_male undead undertale undertale_(series) video_games w.d._gaster yaoi

animated_skeletonbigger_dom

2boys 2d anal animated_skeleton bigger_dom bigger_dom_smaller_sub bottom_sans carrying carrying_partner carrying_position digital_media dominant dominant_male domination duo ectopenis english_text gay humanoid in_heat licking_face male male/male male_focus male_only maledom malesub monster monster_boy penis profanity reverse_stand_and_carry_position reverse_suspended_congress sans_(undertale) sanster sex simple_background skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom spoopy-gaster submissive submissive_male tentacle tentacle_around_penis tentacle_on_male tentacle_sex tentacles_on_male text text_bubble top_gaster undead undertale undertale_(series) video_games w.d._gaster yaoi

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