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2020s 2023 2boys 2d 2d_(artwork) animated_skeleton artist_name blue_belly blue_blush blush bodily_fluids boner_blossom bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media_(artwork) drooling duo ectobelly ectopenis english_text fantasizing fontcest genitals hooded_jacket hoodie humanoid imagining implied_penetration implied_sex incest intraspecies jacket line_art lineart looking_at_genitalia looking_at_penis male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy orange_penis papyrus papyrus_(undertale) papysans penis pleasure_face precum precum_drip profanity sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sweat text thought_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) animated_skeleton artist_name blue_belly blue_blush blush bodily_fluids boner_blossom bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing digital_media_(artwork) drooling duo ectobelly ectopenis english_text fantasizing fontcest genitals hooded_jacket hoodie humanoid imagining implied_penetration implied_sex incest intraspecies jacket line_art lineart looking_at_genitalia looking_at_penis male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy orange_penis papyrus papyrus_(undertale) papysans penis pleasure_face precum precum_drip profanity sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sweat text thought_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi
1boy 2020s 2023 2d 2d_(artwork) animated_skeleton blue_blush blue_cum blue_penis blush boner_blossom book completely_nude completely_nude_male cum cum_on_object cumshot digital_media_(artwork) ectopenis ejaculation genital_fluids genitals grey_background hand_on_hip kneel male male_masturbation male_only masturbation monster monster_boy nude nude_male penile_masturbation penis sans sans_(undertale) simple_background skeleton sketch solo_male sweat twitter twitter_username undead undertale undertale_(series) video_game_character video_games
1boy 2020s 2023 2d 2d_(artwork) animated_skeleton blue_blush blue_cum blue_penis blush boner_blossom book completely_nude completely_nude_male cum cum_on_object cumshot digital_media_(artwork) ectopenis ejaculation genital_fluids genitals grey_background hand_on_hip kneel male male_masturbation male_only masturbation monster monster_boy nude nude_male penile_masturbation penis sans sans_(undertale) simple_background skeleton sketch solo_male sweat twitter twitter_username undead undertale undertale_(series) video_game_character video_games
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2020s 2022 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue bodily_fluids boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers crying crying_with_eyes_open digital_media_(artwork) drooling duo ectopenis ectoplasm english_text fluids fontcest gay heart-shaped_pupils heart_eyes humanoid incest intraspecies larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male missionary_position monster monster_boy non-con non-consensual noncon nonconsensual nude nude_male orange_penis papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis rape safeword sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat tears text text_bubble thrusting tongue top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020 2020s 2boys 2d 2d_(artwork) anal animated_skeleton big_cock big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_border blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers carrying carrying_partner chair clothed comic_sans commission_art covering_another's_mouth covering_mouth digital_media_(artwork) drooling duo ectoplasm english_text fontcest gay humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating moaning monster monster_boy orange_blush outdoor_sex outdoors pants pants_around_one_leg papyrus papyrus_(font) papyrus_(undertale) papysans penetration public_sex reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting sitting_on_chair skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat text text_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020 2020s 2boys 2d 2d_(artwork) anal animated_skeleton big_cock big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller black_border blue_blush blush boner_blossom bottom_sans bottomless bottomless_male brother/brother brother_penetrating_brother brothers carrying carrying_partner chair clothed comic_sans commission_art covering_another's_mouth covering_mouth digital_media_(artwork) drooling duo ectoplasm english_text fontcest gay humanoid incest intraspecies larger_male larger_penetrating male male/male male_penetrating moaning monster monster_boy orange_blush outdoor_sex outdoors pants pants_around_one_leg papyrus papyrus_(font) papyrus_(undertale) papysans penetration public_sex reverse_suspended_congress sans sans_(undertale) seme_papyrus sex sibling_incest siblings sitting sitting_on_chair skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom speech_bubble sweat text text_bubble top_papyrus twitter twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
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1cuntboy 2010s 2019 2d 2d_(artwork) after_sex after_vaginal animated_skeleton artist_name blue_blush blue_hoodie blue_jacket blue_pussy blue_tongue blush boner_blossom bottom_sans bottomless bottomless_cuntboy colored_cum cum cum_in_pussy cum_leaking cum_leaking_out_of_pussy cuntboy cuntboysub digital_media_(artwork) ectopussy english_text grabbing_own_leg grabbing_own_legs hooded_jacket hoodie implied_incest jacket legs_apart legs_spread looking_at_viewer monster on_bed orange_cum panting pink_slippers pussy sans sans_(undertale) shoes_removed skeleton slippers solo spread_legs submissive_cuntboy talking talking_to_viewer text tongue twitter twitter_username uke_sans undead undertale undertale_(series) video_games visible_breath yaoi
1cuntboy 2010s 2019 2d 2d_(artwork) after_sex after_vaginal animated_skeleton artist_name blue_blush blue_hoodie blue_jacket blue_pussy blue_tongue blush boner_blossom bottom_sans bottomless bottomless_cuntboy colored_cum cum cum_in_pussy cum_leaking cum_leaking_out_of_pussy cuntboy cuntboysub digital_media_(artwork) ectopussy english_text grabbing_own_leg grabbing_own_legs hooded_jacket hoodie implied_incest jacket legs_apart legs_spread looking_at_viewer monster on_bed orange_cum panting pink_slippers pussy sans sans_(undertale) shoes_removed skeleton slippers solo spread_legs submissive_cuntboy talking talking_to_viewer text tongue twitter twitter_username uke_sans undead undertale undertale_(series) video_games visible_breath yaoi