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1boy 1cuntboy 2020s 2021 2d 2d_(artwork) abosinsin animated_skeleton ass_spanking bad_id bad_twitter_id blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bodily_fluids bottom_sans bottomless brother brother/brother brother_and_brother brothers butt_spanking cuntboy cuntboy_focus cuntboysub digital_media_(artwork) dominant dominant_male duo ectoplasm ectopussy english_text fluids fontcest gloves grabbing_sheets gripping_sheets hand heart-shaped_pupils heart_eyes hooded_jacket hoodie inactive_account incest jacket kneeling looking_back male maledom monster papyrus papyrus_(undertale) papysans pink_socks punishment pussy red_gloves sans sans_(undertale) seme_papyrus skeleton socks solo_focus spank_marks spanking spanking_ass spanking_butt submissive submissive_cuntboy sweat text top_papyrus twitter_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games visible_breath white_background yaoi

1boy 1cuntboy 2020s 2021 2d 2d_(artwork)abosinsin animated_skeleton ass_spanking bad_id bad_twitter_id blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bodily_fluids bottom_sans bottomless brother brother/brother brother_and_brother brothers butt_spanking cuntboy cuntboy_focus cuntboysub digital_media_(artwork)dominant dominant_male duo ectoplasm ectopussy english_text fluids fontcest gloves grabbing_sheets gripping_sheets hand heart-shaped_pupils heart_eyes hooded_jacket hoodie inactive_account incest jacket kneeling looking_back male maledom monster papyrus papyrus_(undertale)papysans pink_socks punishment pussy red_gloves sans sans_(undertale)seme_papyrus skeleton socks solo_focus spank_marks spanking spanking_ass spanking_butt submissive submissive_cuntboy sweat text top_papyrus twitter_username uke_sans undead undertale undertale_(series)unseen_male unseen_male_face video_game_character video_games visible_breath white_background yaoi

1boy 1cuntboy 2020s 2021 2d 2d_(artwork) abosinsin animated_skeleton ass_spanking bad_id bad_twitter_id blue_blush blue_eyes blue_hoodie blue_jacket blue_tongue blush bodily_fluids bottom_sans bottomless brother brother/brother brother_and_brother brothers butt_spanking cuntboy cuntboy_focus cuntboysub digital_media_(artwork) dominant dominant_male duo ectoplasm ectopussy english_text fluids fontcest gloves grabbing_sheets gripping_sheets hand heart-shaped_pupils heart_eyes hooded_jacket hoodie inactive_account incest jacket kneeling looking_back male maledom monster papyrus papyrus_(undertale) papysans pink_socks punishment pussy red_gloves sans sans_(undertale) seme_papyrus skeleton socks solo_focus spank_marks spanking spanking_ass spanking_butt submissive submissive_cuntboy sweat text top_papyrus twitter_username uke_sans undead undertale undertale_(series) unseen_male unseen_male_face video_game_character video_games visible_breath white_background yaoi

>:o 2020s 2021 2d 2d_(artwork) abosinsin anger_vein angry animated_skeleton apron bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_tongue blush bottom_sans brothers cussing digital_media_(artwork) duo english_text fontcest gloves grabbing_another's_chin grabbing_face hooded_jacket hoodie implied_incest inactive_account indoors jacket larger_male male monster orange_apron papyrus papyrus_(undertale) papysans profanity red_gloves red_sweater sans sans_(undertale) seme_papyrus skeleton small_sub small_sub_big_dom smaller_sub smaller_sub_bigger_dom swearing sweat sweater text top_papyrus twitter_username uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

1:1 1:1_aspect_ratio 2010s 2017 2boys 2d 2d_(artwork) animated_skeleton bed bedroom big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_jacket blue_penis blue_tongue blush boots bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers digital_media_(artwork) duo ectopenis ectoplasm ectotongue facing_another fontcest gay gloves glowing glowing_eye glowing_genitalia glowing_penis incest indoors intraspecies jacket larger_male larger_penetrating male male/male male_only male_penetrated male_penetrating male_penetrating_male mastery_position monster monster_boy on_bed orange_blush orange_penis orange_tongue papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration pink_slippers precum precum_drip precum_on_penis red_boots red_gloves saliva saliva_on_finger sans sans_(undertale) seme_papyrus sex shoes_on sibling_incest siblings sitting_on_bed skeleton slippers small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom soul soul_sex sweat text tongue tongue_out top_papyrus uke_sans undead undertale undertale_(series) unknown_artist video_game_character video_games yaoi