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... 1boy 1cuntboy 2010s 2018 2d 2d_(artwork) anger_vein animated_skeleton artist_name blue_blush blue_pussy blue_tongue blush bottom_sans bottomless bottomless_cuntboy bound brothers clothed cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue edit edited english_text fontcest frustrated humanoid imminent_penetration incest intraspecies joke long_image male male/cuntboy maledom monster monster_boy multiple_images orange_blush orange_tentacles papyrus papyrus_(undertale) papysans partially_colored penetration pun pussy pussy_focus sans sans_(undertale) seme_papyrus sequence sequential sex sibling_incest siblings simple_background skeleton slimeybonez solo_focus speech_bubble spoken_ellipsis submissive submissive_cuntboy talking tall_image tentacle tentacle_penetration tentacle_sex tentacles_around_legs tentacles_around_wrists text text_bubble third-party_edit tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) upper_body video_game_character video_games white_background yaoi

...1boy 1cuntboy 2010s 2018 2d 2d_(artwork)anger_vein animated_skeleton artist_name blue_blush blue_pussy blue_tongue blush bottom_sans bottomless bottomless_cuntboy bound brothers clothed cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork)dominant dominant_male duo ectopussy ectotongue edit edited english_text fontcest frustrated humanoid imminent_penetration incest intraspecies joke long_image male male/cuntboy maledom monster monster_boy multiple_images orange_blush orange_tentacles papyrus papyrus_(undertale)papysans partially_colored penetration pun pussy pussy_focus sans sans_(undertale)seme_papyrus sequence sequential sex sibling_incest siblings simple_background skeleton slimeybonez solo_focus speech_bubble spoken_ellipsis submissive submissive_cuntboy talking tall_image tentacle tentacle_penetration tentacle_sex tentacles_around_legs tentacles_around_wrists text text_bubble third-party_edit tongue top_papyrus tumblr uke_sans undead undertale undertale_(series)upper_body video_game_character video_games white_background yaoi

... 1boy 1cuntboy 2010s 2018 2d 2d_(artwork) anger_vein animated_skeleton artist_name blue_blush blue_pussy blue_tongue blush bottom_sans bottomless bottomless_cuntboy bound brothers clothed cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male duo ectopussy ectotongue edit edited english_text fontcest frustrated humanoid imminent_penetration incest intraspecies joke long_image male male/cuntboy maledom monster monster_boy multiple_images orange_blush orange_tentacles papyrus papyrus_(undertale) papysans partially_colored penetration pun pussy pussy_focus sans sans_(undertale) seme_papyrus sequence sequential sex sibling_incest siblings simple_background skeleton slimeybonez solo_focus speech_bubble spoken_ellipsis submissive submissive_cuntboy talking tall_image tentacle tentacle_penetration tentacle_sex tentacles_around_legs tentacles_around_wrists text text_bubble third-party_edit tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) upper_body video_game_character video_games white_background yaoi

1boy 1cuntboy 2010s 2018 animated_skeleton artist_name blue_blush blue_tongue blush bottom_sans bound brothers clothed cuntboy cuntboy_focus cuntboysub ectotongue english_text fontcest humanoid incest intraspecies male/cuntboy monster monster_boy orange_tentacles papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton slimeybonez solo_focus submissive submissive_cuntboy tentacle text tongue top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face upper_body white_background yaoi

1boy 1cuntboy 2010s 2018 animated_skeleton artist_name blue_blush blue_pussy blush bottom_sans bottomless bottomless_cuntboy bound brothers clothed cuntboy cuntboy_focus cuntboy_penetrated cuntboysub ectopussy english_text fontcest humanoid incest intraspecies male/cuntboy monster monster_boy orange_tentacles papyrus papyrus_(undertale) papysans partially_colored penetration pussy pussy_focus sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton slimeybonez solo_focus submissive submissive_cuntboy tentacle tentacle_penetration tentacle_sex text top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_character unseen_male unseen_male_face white_background yaoi