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1boy 1girls breasts female female_focus kesty papyrus_(littletale) papyrus_au sans_(littletale) undertale_au undertale_fanfiction
1boy 1girls breasts female female_focus kesty papyrus_(littletale) papyrus_au sans_(littletale) undertale_au undertale_fanfiction
1boy 2d anthro ectopenis exhibition exhibitionism exhibitionist humanoid male male_only masturbating masturbation monster monster_boy monster_cock mutual_masturbation nekromeowncer papyrus papyrus_(underswap) papyrus_au pov pov_eye_contact skeleton solo solo_male underswap underswap_papyrus undertale undertale_(series) undertale_au
1boy 2d anthro ectopenis exhibition exhibitionism exhibitionist humanoid male male_only masturbating masturbation monster monster_boy monster_cock mutual_masturbation nekromeowncer papyrus papyrus_(underswap) papyrus_au pov pov_eye_contact skeleton solo solo_male underswap underswap_papyrus undertale undertale_(series) undertale_au
2boys 2d animated animated_gif blowjob ectobody ectopenis fellatio gay gloves humanoid incest looping_animation male male_only offscreen_character offscreen_male oral orange_penis papyrus papyrus_(underswap) papyrus_au penis_vein pov saliva saliva_on_penis sans sans_(underswap) sans_au scarf sex tagme tears underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au wor_mspit yaoi
2boys 2d animated animated_gif blowjob ectobody ectopenis fellatio gay gloves humanoid incest looping_animation male male_only offscreen_character offscreen_male oral orange_penis papyrus papyrus_(underswap) papyrus_au penis_vein pov saliva saliva_on_penis sans sans_(underswap) sans_au scarf sex tagme tears underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au wor_mspit yaoi
anal anal_penetration anal_sex digital_drawing_(artwork) digital_media_(artwork) gay incest male male/male male_only male_penetrating male_penetrating_male papyrus papyrus_(underswap) papyrus_au sans sans_(underfell) sans_au tagme undertale undertale_(series) undertale_au yaoi
anal anal_penetration anal_sex digital_drawing_(artwork) digital_media_(artwork) gay incest male male/male male_only male_penetrating male_penetrating_male papyrus papyrus_(underswap) papyrus_au sans sans_(underfell) sans_au tagme undertale undertale_(series) undertale_au yaoi
2d breasts dusttrust paper papyrus papyrus_au rule_63 sans sans_au sketch smoking tagme tagme_(artist) thick_thighs thighs underswap underswap_papyrus underswap_sans underswap_sans_genderswap undertale undertale_(series) undertale_au
2d breasts dusttrust paper papyrus papyrus_au rule_63 sans sans_au sketch smoking tagme tagme_(artist) thick_thighs thighs underswap underswap_papyrus underswap_sans underswap_sans_genderswap undertale undertale_(series) undertale_au
2d 3boys alternate_universe animated_skeleton beoteono blowjob comic comic_panel deepthroat drool ectopenis english_text humanoid incest male male_only non-human oral papyrus papyrus_(underfell) papyrus_au sans sans_au sex skeleton table talking teasing text toony undead underfell underswap_papyrus underswap_sans undertale_(series)
2d 3boys alternate_universe animated_skeleton beoteono blowjob comic comic_panel deepthroat drool ectopenis english_text humanoid incest male male_only non-human oral papyrus papyrus_(underfell) papyrus_au sans sans_au sex skeleton table talking teasing text toony undead underfell underswap_papyrus underswap_sans undertale_(series)
alternate_universe animated_skeleton beoteono ectopenis ectopussy male male_only non-human papyrus_(underswap) papyrus_au penetration sans sans_(underswap) skeleton toony undead underswap undertale_au yaoi
alternate_universe animated_skeleton beoteono ectopenis ectopussy male male_only non-human papyrus_(underswap) papyrus_au penetration sans sans_(underswap) skeleton toony undead underswap undertale_au yaoi
alternate_universe animated_skeleton beoteono blowjob ectopenis male male_only non-human papyrus_(underswap) papyrus_au sans sans_(underswap) skeleton toony undead underswap undertale_au yaoi
alternate_universe animated_skeleton beoteono blowjob ectopenis male male_only non-human papyrus_(underswap) papyrus_au sans sans_(underswap) skeleton toony undead underswap undertale_au yaoi
alternate_universe animated_skeleton beoteono cum cum_on_penis drooling ectopenis male_only non-human papyrus_(underswap) papyrus_au skeleton toony undead underswap undertale_au
alternate_universe animated_skeleton beoteono cum cum_on_penis drooling ectopenis male_only non-human papyrus_(underswap) papyrus_au skeleton toony undead underswap undertale_au
2boys 2d alternate_universe animated_skeleton beoteono comic comic_page comic_panel ectopenis english_text forced humanoid incest male male_only non-human papyrus_(underfell) papyrus_au restrained sans sans_(underfell) skeleton tagme text toony undead underfell undertale_(series) undertale_au yaoi
2boys 2d alternate_universe animated_skeleton beoteono comic comic_page comic_panel ectopenis english_text forced humanoid incest male male_only non-human papyrus_(underfell) papyrus_au restrained sans sans_(underfell) skeleton tagme text toony undead underfell undertale_(series) undertale_au yaoi
2boys 2d alternate_universe animated_skeleton bondage comic comic_page comic_panel cum cum_on_penis drooling ectopenis english_text forced gagged humanoid ksuriuri male male_only non-human papyrus_(underfell) papyrus_(underswap) papyrus_au skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2boys 2d alternate_universe animated_skeleton bondage comic comic_page comic_panel cum cum_on_penis drooling ectopenis english_text forced gagged humanoid ksuriuri male male_only non-human papyrus_(underfell) papyrus_(underswap) papyrus_au skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2d 4boys alternate_universe anal animated_skeleton bondage comic comic_page comic_panel crying cum cum_in_ass cum_inside drooling dubcon ectobody ectobutt ectopenis english_text forced gagged humanoid incest ksuriuri male male_only masturbating_while_penetrated non-human papyrus_(underswap) papyrus_au precum red_body sans sans_(underfell) sans_(underswap) sans_au sex skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2d 4boys alternate_universe anal animated_skeleton bondage comic comic_page comic_panel crying cum cum_in_ass cum_inside drooling dubcon ectobody ectobutt ectopenis english_text forced gagged humanoid incest ksuriuri male male_only masturbating_while_penetrated non-human papyrus_(underswap) papyrus_au precum red_body sans sans_(underfell) sans_(underswap) sans_au sex skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2d 3boys alternate_universe anal animated_skeleton bondage comic comic_page comic_panel cringe crying drooling dubcon ectopenis english_text forced gagged humanoid incest ksuriuri male male_only masturbating_while_penetrated non-human papyrus_(underswap) papyrus_au power_bottom precum sans sans_(underfell) sans_(underswap) sans_au sex skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2d 3boys alternate_universe anal animated_skeleton bondage comic comic_page comic_panel cringe crying drooling dubcon ectopenis english_text forced gagged humanoid incest ksuriuri male male_only masturbating_while_penetrated non-human papyrus_(underswap) papyrus_au power_bottom precum sans sans_(underfell) sans_(underswap) sans_au sex skeleton talking text toony undead underfell underswap undertale_(series) undertale_au yaoi
2boys 2d alternate_universe anal animated_skeleton blowjob bondage comic comic_page comic_panel drooling dubcon ectobody ectobutt ectopenis english_text forced gagged humanoid incest ksuriuri male male_only orange_penis papyrus_(underswap) papyrus_au power_bottom precum red_ass red_body red_butt sans sans_(underfell) sans_au sex skeleton talking text undead underfell underswap undertale_(series) undertale_au unzipped_pants yaoi
2boys 2d alternate_universe anal animated_skeleton blowjob bondage comic comic_page comic_panel drooling dubcon ectobody ectobutt ectopenis english_text forced gagged humanoid incest ksuriuri male male_only orange_penis papyrus_(underswap) papyrus_au power_bottom precum red_ass red_body red_butt sans sans_(underfell) sans_au sex skeleton talking text undead underfell underswap undertale_(series) undertale_au unzipped_pants yaoi
2boys 2d alternate_universe animated_skeleton bondage comic comic_page comic_panel drooling dubcon ectopenis english_text forced gagged humanoid imminent_sex incest ksuriuri male male_only orange_penis papyrus_(underswap) papyrus_au precum sans sans_(underfell) sans_au skeleton talking text undead underfell underswap undertale_(series) undertale_au unzipped_pants yaoi
2boys 2d alternate_universe animated_skeleton bondage comic comic_page comic_panel drooling dubcon ectopenis english_text forced gagged humanoid imminent_sex incest ksuriuri male male_only orange_penis papyrus_(underswap) papyrus_au precum sans sans_(underfell) sans_au skeleton talking text undead underfell underswap undertale_(series) undertale_au unzipped_pants yaoi
2boys 2d alternate_universe animated_skeleton blowjob bondage comic comic_page comic_panel cum cum_in_pants english_text erection erection_under_clothes forced humanoid incest ksuriuri licking_penis male male_only papyrus_(underswap) papyrus_au sans sans_(underfell) sans_au skeleton text undead underfell underswap undertale_(series) undertale_au yaoi
2boys 2d alternate_universe animated_skeleton blowjob bondage comic comic_page comic_panel cum cum_in_pants english_text erection erection_under_clothes forced humanoid incest ksuriuri licking_penis male male_only papyrus_(underswap) papyrus_au sans sans_(underfell) sans_au skeleton text undead underfell underswap undertale_(series) undertale_au yaoi
2d abosinsin ambiguous_penetration blush color gay heart horror_sans horrortale_papyrus incest male male_penetrating non-human panting papyrus_(horrortale) papyrus_au sans sans_(horrortale) sans_au skeleton tagme toony undertale undertale_(series) undertale_au
2d abosinsin ambiguous_penetration blush color gay heart horror_sans horrortale_papyrus incest male male_penetrating non-human panting papyrus_(horrortale) papyrus_au sans sans_(horrortale) sans_au skeleton tagme toony undertale undertale_(series) undertale_au
1girls 2d acidd_grrs biting_lip blush color cum_in_pussy dialogue ectobody english english_text female_sans genderswap_(mtf) heart incest male_penetrating naked_female nude_female papyrus papyrus_au 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
1girls 2d acidd_grrs biting_lip blush color cum_in_pussy dialogue ectobody english english_text female_sans genderswap_(mtf) heart incest male_penetrating naked_female nude_female papyrus papyrus_au 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
1girls 2d 5_fingers acidd_grrs blue_gloves blush color dialogue english english_dialogue english_text female_sans fully_clothed 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
1girls 2d 5_fingers acidd_grrs blue_gloves blush color dialogue english english_dialogue english_text female_sans fully_clothed 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
2boys 2d 2d_(artwork) 2d_artwork color dialogue ectopenis english english_dialogue english_text ghostskeleto ink_papyrus inktale papyrus papyrus_au penis_lick skeleton tail text tied_up uncensored uncensored_penis undertale undertale_(series) undertale_au
2boys 2d 2d_(artwork) 2d_artwork color dialogue ectopenis english english_dialogue english_text ghostskeleto ink_papyrus inktale papyrus papyrus_au penis_lick skeleton tail text tied_up uncensored uncensored_penis undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork color dialogue english english_dialogue english_text ghostskeleto muffet papyrus papyrus_au praise skeleton tagme tears_of_joy text thighs thought_bubble undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork color dialogue english english_dialogue english_text ghostskeleto muffet papyrus papyrus_au praise skeleton tagme tears_of_joy text thighs thought_bubble undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork color dialogue english english_dialogue english_text ghostskeleto muffet papyrus papyrus_au purple_skin spider swimsuit tagme text undertale undertale_(series) undertale_au
2d 2d_(artwork) 2d_artwork color dialogue english english_dialogue english_text ghostskeleto muffet papyrus papyrus_au purple_skin spider swimsuit tagme text undertale undertale_(series) undertale_au
blue_eyes blue_tongue bonetrouble cum cum_on_face cum_on_tongue ectopenis grabbing_head head_grab holding_head incest papyrus_(underswap) papyrus_au sans sans_au scarf skeleton tagme tongue tongue_out underswap underswap_papyrus underswap_sans undertale_au
blue_eyes blue_tongue bonetrouble cum cum_on_face cum_on_tongue ectopenis grabbing_head head_grab holding_head incest papyrus_(underswap) papyrus_au sans sans_au scarf skeleton tagme tongue tongue_out underswap underswap_papyrus underswap_sans undertale_au
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 pov sans sans_au scarf sex skeleton small_fangs star_eyes star_shaped_pupils tongue tongue_out toony underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction
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 pov sans sans_au scarf sex skeleton small_fangs star_eyes star_shaped_pupils tongue tongue_out toony underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction
!! 2d acidd_grrs alternate_universe animated_skeleton artist_name blue_body blue_breasts blush brother_and_sister chubby chubby_female closed_eyes color ectobody ectobreasts exclamation_point female genderswap_(mtf) half-dressed heart incest male male/female male_penetrating orange_body orange_hoodie pants_down papyrus_(underswap) papyrus_au rule_63 sans simple_background skeleton straight taller_male uncensored underswap underswap_papyrus undertale undertale_(series) undertale_au white_background
!! 2d acidd_grrs alternate_universe animated_skeleton artist_name blue_body blue_breasts blush brother_and_sister chubby chubby_female closed_eyes color ectobody ectobreasts exclamation_point female genderswap_(mtf) half-dressed heart incest male male/female male_penetrating orange_body orange_hoodie pants_down papyrus_(underswap) papyrus_au rule_63 sans simple_background skeleton straight taller_male uncensored underswap underswap_papyrus undertale undertale_(series) undertale_au white_background
2d alternate_universe animated_skeleton bunny_costume chubby color cute dialogue dust_papyrus dust_sans dusttale dusttale_sans ectobreasts english english_dialogue english_text fan_character female_focus female_sans i_wuv_cofi papyrus_au sans sans_au sanscest skeleton solo_focus text underswap underswap_genderswap underswap_sans underswap_sans_genderswap undertale undertale_(series) undertale_au
2d alternate_universe animated_skeleton bunny_costume chubby color cute dialogue dust_papyrus dust_sans dusttale dusttale_sans ectobreasts english english_dialogue english_text fan_character female_focus female_sans i_wuv_cofi papyrus_au sans sans_au sanscest skeleton solo_focus text underswap underswap_genderswap underswap_sans underswap_sans_genderswap undertale undertale_(series) undertale_au
2boys absurd_res anal anal_sex anon ass balls big_sub blush blushing breath cum dripping_cum ectobody erection gay gay_sex gray_background gray_body hi_res highres humanoid looking_at_another looking_down looking_pleasured male male/male male_only moan moaning monster muscular naked nude open_mouth papyrus_(underfell) papyrus_au pecs penetration penis power_bottom presenting_ass red_blush red_body red_eyes red_pupils red_skin redeyedgazer ridged_penis sex simple_background size_difference skeleton skull skull_head smile squatting sweat tongue tongue_out underfell underfell_papyrus undertale_(series) undertale_au
2boys absurd_res anal anal_sex anon ass balls big_sub blush blushing breath cum dripping_cum ectobody erection gay gay_sex gray_background gray_body hi_res highres humanoid looking_at_another looking_down looking_pleasured male male/male male_only moan moaning monster muscular naked nude open_mouth papyrus_(underfell) papyrus_au pecs penetration penis power_bottom presenting_ass red_blush red_body red_eyes red_pupils red_skin redeyedgazer ridged_penis sex simple_background size_difference skeleton skull skull_head smile squatting sweat tongue tongue_out underfell underfell_papyrus undertale_(series) undertale_au
2boys absurd_res anal anal_sex anon ass balls big_sub blush bouncing_penis breath cum dripping_cum ectobody erection faceless_male gay gay_sex gray_background gray_body hi_res highres humanoid looking_at_another looking_down looking_pleasured male male/male male_only moan moaning monster muscular open_mouth papyrus_(underfell) papyrus_au pecs penetration penis power_bottom precum presenting_ass red_blush red_body red_eyes red_pupils red_skin redeyedgazer ridged_penis sex simple_background size_difference skeleton skull skull_head smile squatting sweat tongue tongue_out underfell underfell_papyrus undertale_(series) undertale_au
2boys absurd_res anal anal_sex anon ass balls big_sub blush bouncing_penis breath cum dripping_cum ectobody erection faceless_male gay gay_sex gray_background gray_body hi_res highres humanoid looking_at_another looking_down looking_pleasured male male/male male_only moan moaning monster muscular open_mouth papyrus_(underfell) papyrus_au pecs penetration penis power_bottom precum presenting_ass red_blush red_body red_eyes red_pupils red_skin redeyedgazer ridged_penis sex simple_background size_difference skeleton skull skull_head smile squatting sweat tongue tongue_out underfell underfell_papyrus undertale_(series) undertale_au
1boy accessory animated_skeleton begging blush bodily_fluids bondage bone bottomwear bound clothed clothing cock_ring cracked_skull crying cuff_(restraint) dialogue dripping english_text erection genital_fluids genital_piercing genitals gold_(metal) gold_tooth hi_res jewelry looking_at_viewer male male_only open_bottomwear open_clothing open_pants orange_penis orange_tongue orgasm_denial pants papyrus_(swapfell) papyrus_au penis penis_accessory penis_jewelry penis_out penis_piercing penis_through_fly piercing poking_out precum precum_drip restraints rope rope_bondage sharp_teeth skeleton solo solo_male speech_bubble swapfell sweater tears teeth text theyaois_(artist) tied_up tongue tongue_out topwear undead undertale_au
1boy accessory animated_skeleton begging blush bodily_fluids bondage bone bottomwear bound clothed clothing cock_ring cracked_skull crying cuff_(restraint) dialogue dripping english_text erection genital_fluids genital_piercing genitals gold_(metal) gold_tooth hi_res jewelry looking_at_viewer male male_only open_bottomwear open_clothing open_pants orange_penis orange_tongue orgasm_denial pants papyrus_(swapfell) papyrus_au penis penis_accessory penis_jewelry penis_out penis_piercing penis_through_fly piercing poking_out precum precum_drip restraints rope rope_bondage sharp_teeth skeleton solo solo_male speech_bubble swapfell sweater tears teeth text theyaois_(artist) tied_up tongue tongue_out topwear undead undertale_au
animated_skeleton blush bodily_fluids bone bottomwear cigarette cigarette_in_mouth clothed clothing english_text erection genital_fluids genitals gesture heart hi_res hoodie looking_at_viewer male male_only object_in_mouth open_bottomwear open_clothing open_pants orange_penis orange_tongue pants papyrus papyrus_(underswap) papyrus_au penis penis_out penis_through_fly poking_out precum precum_bead selfie skeleton solo solo_male text theyaois_(artist) tongue tongue_out topwear undead underswap undertale_au v_sign
animated_skeleton blush bodily_fluids bone bottomwear cigarette cigarette_in_mouth clothed clothing english_text erection genital_fluids genitals gesture heart hi_res hoodie looking_at_viewer male male_only object_in_mouth open_bottomwear open_clothing open_pants orange_penis orange_tongue pants papyrus papyrus_(underswap) papyrus_au penis penis_out penis_through_fly poking_out precum precum_bead selfie skeleton solo solo_male text theyaois_(artist) tongue tongue_out topwear undead underswap undertale_au v_sign
1boy 2d animated_skeleton blush bone bottomwear clothed clothing ectopenis erection genitals gloves glowing glowing_genitalia glowing_penis grabbing_own_penis grabbing_penis grin handwear hi_res holding_leash holding_object holding_penis humanoid leash licking licking_lips looking_at_viewer male male_only open_bottomwear open_clothing open_pants orange_background pants papyrus papyrus_(underfell) papyrus_au penis penis_grab penis_out penis_through_fly poking_out scar scarf shirt simple_background skeleton smile solid_color_background solo theyaois_(artist) tongue tongue_out topwear undead underfell underfell_papyrus undertale_(series) undertale_au
1boy 2d animated_skeleton blush bone bottomwear clothed clothing ectopenis erection genitals gloves glowing glowing_genitalia glowing_penis grabbing_own_penis grabbing_penis grin handwear hi_res holding_leash holding_object holding_penis humanoid leash licking licking_lips looking_at_viewer male male_only open_bottomwear open_clothing open_pants orange_background pants papyrus papyrus_(underfell) papyrus_au penis penis_grab penis_out penis_through_fly poking_out scar scarf shirt simple_background skeleton smile solid_color_background solo theyaois_(artist) tongue tongue_out topwear undead underfell underfell_papyrus undertale_(series) undertale_au
2d 4boys ahe_gao artist_request color cum cum_on_face dialogue english english_dialogue english_text femboy gangbang gay heart-shaped_pupils horny incest male monster monster_boy papyrus papyrus_au penis penis_on_face sans sans_au sex shirt_pull tag tagme_(artist) text underfell_papyrus underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au
2d 4boys ahe_gao artist_request color cum cum_on_face dialogue english english_dialogue english_text femboy gangbang gay heart-shaped_pupils horny incest male monster monster_boy papyrus papyrus_au penis penis_on_face sans sans_au sex shirt_pull tag tagme_(artist) text underfell_papyrus underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au
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
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
2boys 2d abosinsin alternate_universe animated_skeleton big_dom_small_sub blush color gay gripping_sheets incest male male_only moaning monster monster_boy papyrus papyrus_(underswap) papyrus_au sans sans_(underswap) sans_au sex size_difference skeleton solo_focus sweat tagme tongue_out underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au unseen_male_face
2boys 2d abosinsin alternate_universe animated_skeleton big_dom_small_sub blush color gay gripping_sheets incest male male_only moaning monster monster_boy papyrus papyrus_(underswap) papyrus_au sans sans_(underswap) sans_au sex size_difference skeleton solo_focus sweat tagme tongue_out underswap underswap_papyrus underswap_sans undertale undertale_(series) undertale_au unseen_male_face
2d anal_beads blush dildo dildo_in_pussy dildo_penetration dildo_riding ectobody english_text hoodie implied_incest incest masturbating_while_watching offscreen_masturbation papyrus_(underswap) papyrus_au riding_dildo rule_63 sans sans_(underswap) sans_au scarf sex_toy skeleton stockings straight tagme tentacle_dildo text trembling underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction vaginal_penetration watching wor_mspit
2d anal_beads blush dildo dildo_in_pussy dildo_penetration dildo_riding ectobody english_text hoodie implied_incest incest masturbating_while_watching offscreen_masturbation papyrus_(underswap) papyrus_au riding_dildo rule_63 sans sans_(underswap) sans_au scarf sex_toy skeleton stockings straight tagme tentacle_dildo text trembling underswap underswap_papyrus underswap_sans undertale_(series) undertale_au undertale_fanfiction vaginal_penetration watching wor_mspit
alternate_universe bite_mark biting blush brothers dust_papyrus dust_sans dusttale dusttale_sans gay headpat implied_incest incest kneeling male male_only overstimulated overstimulation panting papyrus papyrus_(dusttale) papyrus_au petting presenting sans sans_(dusttale) sans_au shaky sitting soul_sex sympharin symphysins undertale_au
alternate_universe bite_mark biting blush brothers dust_papyrus dust_sans dusttale dusttale_sans gay headpat implied_incest incest kneeling male male_only overstimulated overstimulation panting papyrus papyrus_(dusttale) papyrus_au petting presenting sans sans_(dusttale) sans_au shaky sitting soul_sex sympharin symphysins undertale_au
2010s 2016 alternate_universe blue_blush blue_body blue_penis blue_tongue blush brosboning brother_and_brother brothers ectobody ectopenis english_text fontcest incest male papyrus_(underswap) papyrus_au papysans penis sans_(underswap) sans_au sitting sitting_on_lap skeleton swapcest sweat text tongue tongue_out underswap undertale_au yaoi
2010s 2016 alternate_universe blue_blush blue_body blue_penis blue_tongue blush brosboning brother_and_brother brothers ectobody ectopenis english_text fontcest incest male papyrus_(underswap) papyrus_au papysans penis sans_(underswap) sans_au sitting sitting_on_lap skeleton swapcest sweat text tongue tongue_out underswap undertale_au yaoi
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