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2010s 2017 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub blue_blush blush blushing_male bottom_sans bound bound_wrists brother brother/brother brother_and_brother brothers christmas clothed clothing digital_media_(artwork) dominant dominant_male domination duo ectopenis english_text fontcest genitals gloves happy_new_year imminent_sex incest intraspecies looking_at_genitalia looking_at_penis looking_down male male/male male_only maledom malesub monster monster_boy new_year orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_out precum questionable_consent red_gloves red_scarf sans sans_(undertale) santa_hat scarf seme_papyrus sequence sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_sub_bigger_dom submissive submissive_male taped_mouth text theyaois tied_up tied_wrists top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi
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2010s 2017 2boys 2d 2d_(artwork) alternate_version_available animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bottom_sans bound bound_wrists brother brother/brother brother_and_brother brothers christmas clothed clothing digital_media_(artwork) dominant dominant_male domination duo english_text fontcest gloves happy_new_year imminent_sex incest intraspecies male male/male male_only maledom malesub monster monster_boy new_year papyrus papyrus_(undertale) papysans questionable_consent red_gloves red_scarf sans sans_(undertale) santa_hat scarf seme_papyrus sequence sequential sibling_incest siblings skeleton small_sub small_sub_big_dom smaller_sub_bigger_dom speech_bubble submissive submissive_male taped_mouth text text_bubble theyaois tied_up tied_wrists top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games yandere yaoi
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2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male long_image male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_penis blue_tongue blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectopenis ectotongue edit edited fontcest from_behind_position gay_sex gloves glowing glowing_genitalia glowing_penis grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male long_image male male/male male_focus male_only maledom malesub monster open_mouth orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure third-party_edit tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_penis bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dominant dominant_male duo ectopenis fontcest from_behind_position gay_sex glowing glowing_genitalia glowing_penis incest larger_male male male/male male_focus male_only maledom malesub monster orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_penis bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dominant dominant_male duo ectopenis fontcest from_behind_position gay_sex glowing glowing_genitalia glowing_penis incest larger_male male male/male male_focus male_only maledom malesub monster orange_penis papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectotongue fontcest from_behind_position glowing grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth papyrus papyrus_(undertale) papysans penetration penetration_from_behind pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_eyes blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing crying crying_with_eyes_open dominant dominant_male duo ectotongue fontcest from_behind_position glowing grabbing grabbing_clothing grabbing_from_behind heart-shaped_pupils heart_eyes incest larger_male male male/male male_focus male_only maledom malesub monster open_mouth papyrus papyrus_(undertale) papysans penetration penetration_from_behind pleasure_face realdemdemdmensfw sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male tears tears_of_pleasure tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games white_background yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_penis blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dated dominant dominant_male duo ectopenis fontcest from_front_position genitals glowing glowing_genitalia glowing_penis heart-shaped_pupils heart_eyes incest jacket kneel larger_male larger_penetrating larger_penetrating_smaller male male/male male_only maledom malesub monster off_shoulder orange_blush orange_penis papyrus papyrus_(undertale) papysans penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive submissive_male sweat top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_penis blush bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dated dominant dominant_male duo ectopenis fontcest from_front_position genitals glowing glowing_genitalia glowing_penis heart-shaped_pupils heart_eyes incest jacket kneel larger_male larger_penetrating larger_penetrating_smaller male male/male male_only maledom malesub monster off_shoulder orange_blush orange_penis papyrus papyrus_(undertale) papysans penis realdemdemdmensfw sans sans_(undertale) seme_papyrus sex skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom submissive submissive_male sweat top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2010s 2018 2boys 2d 2d_(artwork) animated_skeleton artist_name ass bigger_male blue_blush blue_penis blush bottom_sans brother brother/brother brother_and_brother brothers closed_eyes dated duo ectopenis fontcest genitals glowing glowing_genitalia glowing_penis hand_on_another's_head hand_on_head humanoid incest kissing larger_male male male/male male_only monster monster_boy nude nude_male orange_blush orange_penis papyrus papyrus_(undertale) papysans partially_colored penis realdemdemdmensfw sans sans_(undertale) seme_papyrus skeleton smaller_male top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
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2010s 2018 2boys 2d 2d_(artwork) anal animated_skeleton artist_name ball_gag big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller bondage bottom_sans bound brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dated dominant dominant_male duo ectopenis ectotongue fellatio fontcest from_front_position gagged gay_sex grey_background handjob humping incest jacket kabedon larger_male larger_penetrating larger_penetrating_smaller legs_apart licking licking_penis male male/male male_only maledom malesub missionary_position monster mouth_gag multiple_views nude off_shoulder papyrus papyrus_(undertale) papysans penetration penetration_from_behind penis realdemdemdmensfw restrained restraints sans sans_(undertale) seme_papyrus sex sex_from_behind simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom solid_color_background submissive submissive_male thrusting thrusting_into_ass tongue tongue_out top_papyrus tumblr uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
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!!! !? 2010s 2boys 2d 2d_(artwork) almost_caught animated_skeleton ass bathing bathroom bathtub blue_blush blush brother brother_and_brother brothers bulging_eyes cheztnuts closed_eyes clothed clothing comic comic_page comic_panel completely_nude digital_media_(artwork) door drooling duo edit edited english_text fingering fingering_self hand_behind_head holding_clothes holding_clothing holding_object long_image male male_masturbation male_only masturbation moaning monster multiple_images nude open_door papyrus papyrus_(undertale) rubbing sans sans_(undertale) sequence sequential shocked shouting skeleton solo_male speech_bubble surprised sweat talking_to_another text text_bubble third-party_edit tumblr undead undertale undertale_(series) video_game_character video_games walk-in water yelling
!!! !? 2010s 2boys 2d 2d_(artwork) almost_caught animated_skeleton ass bathing bathroom bathtub blue_blush blush brother brother_and_brother brothers bulging_eyes cheztnuts closed_eyes clothed clothing comic comic_page comic_panel completely_nude digital_media_(artwork) door drooling duo edit edited english_text fingering fingering_self hand_behind_head holding_clothes holding_clothing holding_object long_image male male_masturbation male_only masturbation moaning monster multiple_images nude open_door papyrus papyrus_(undertale) pussy rubbing sans sans_(undertale) sequence sequential shocked shouting skeleton solo_male speech_bubble surprised sweat talking_to_another tall_image text text_bubble third-party_edit tumblr undead undertale undertale_(series) video_game_character video_games walk-in water yelling
!!! !? 2010s 2boys 2d 2d_(artwork) almost_caught animated_skeleton ass bathing bathroom bathtub blue_blush blush brother brother_and_brother brothers bulging_eyes cheztnuts closed_eyes clothed clothing comic comic_page comic_panel completely_nude digital_media_(artwork) door drooling duo edit edited english_text fingering fingering_self hand_behind_head holding_clothes holding_clothing holding_object long_image male male_masturbation male_only masturbation moaning monster multiple_images nude open_door papyrus papyrus_(undertale) pussy rubbing sans sans_(undertale) sequence sequential shocked shouting skeleton solo_male speech_bubble surprised sweat talking_to_another tall_image text text_bubble third-party_edit tumblr undead undertale undertale_(series) video_game_character video_games walk-in water yelling
!!! !? 2010s 2boys 2d 2d_(artwork) almost_caught animated_skeleton ass bathing bathroom bathtub blue_blush blush brother brother_and_brother brothers bulging_eyes cheztnuts closed_eyes clothed clothing comic comic_page comic_panel completely_nude digital_media_(artwork) door drooling duo english_text fingering fingering_self holding_clothes holding_clothing holding_object male male_masturbation male_only masturbation moaning monster nude open_door papyrus papyrus_(undertale) rubbing sans sans_(undertale) sequence sequential shocked shouting skeleton speech_bubble surprised sweat talking_to_another text text_bubble tumblr undead undertale undertale_(series) video_game_character video_games walk-in water yelling
!!! !? 2010s 2boys 2d 2d_(artwork) almost_caught animated_skeleton ass bathing bathroom bathtub blue_blush blush brother brother_and_brother brothers bulging_eyes cheztnuts closed_eyes clothed clothing comic comic_page comic_panel completely_nude digital_media_(artwork) door drooling duo english_text fingering fingering_self holding_clothes holding_clothing holding_object male male_masturbation male_only masturbation moaning monster nude open_door papyrus papyrus_(undertale) rubbing sans sans_(undertale) sequence sequential shocked shouting skeleton speech_bubble surprised sweat talking_to_another text text_bubble tumblr undead undertale undertale_(series) video_game_character video_games walk-in water yelling
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2010s 2018 2boys after_fellatio after_oral angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth dominant dominant_male duo ectopenis edit edited english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket kneel larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus submissive submissive_male sympharin symphysins talking_to_another tears text third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys after_fellatio after_oral animated_skeleton black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth duo english_text fontcest hoodie incest intraspecies jacket kneeling male male/male male_only maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch solo_focus submissive submissive_male sympharin symphysins talking_to_another text top_papyrus uke_sans undead undertale undertale_(series) unseen_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys after_fellatio after_oral animated_skeleton black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing cum_in_mouth duo english_text fontcest hoodie incest intraspecies jacket kneeling male male/male male_only maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch solo_focus submissive submissive_male sympharin symphysins talking_to_another text top_papyrus uke_sans undead undertale undertale_(series) unseen_character video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
1:1 1:1_aspect_ratio 2010s 2018 2boys angry animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white bottom_sans brother brother/brother brother_and_brother brothers clothed clothing dominant dominant_male duo ectopenis english_text fontcest forced_fellatio forced_oral gloves head_wings hoodie incest intraspecies irrumatio jacket larger_male male male/male male_only male_pov maledom malesub monochrome monster monster_boy papyrus papyrus_(undertale) papysans penis penis_in_mouth pov sans sans_(undertale) seme_papyrus sibling_incest siblings skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom submissive submissive_male sympharin symphysins talking_to_another tears text top_papyrus uke_sans undead undertale undertale_(series) video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dark_background digital_media_(artwork) duo fontcest from_behind_position hat headwear hooded_jacket hoodie implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2023 2boys 2d 2d_(artwork) all_fours animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_background blanket blue_blush blush blush_lines bottom_sans boxers_(clothing) boxers_around_one_leg brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing dark_background digital_media_(artwork) duo fontcest from_behind_position hat headwear hooded_jacket hoodie implied_bottomless implied_penetration implied_sex inactive_account incest interlocked_fingers intertwined_fingers intraspecies jacket larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monster monster_boy nightcap on_bed one_eye_closed orange_blush pajamas papyrus papyrus_(undertale) papysans polka_dot_clothing polka_dot_hat polka_dot_pajamas sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom striped_bottomwear striped_boxers text top_papyrus topwear toubigaizi twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi
2020s 2023 2boys 2d 2d_(artwork) anger_vein animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white blush blush_lines bottom_sans brother brother/brother brother_and_brother brothers cape clothed clothing digital_media_(artwork) duo fontcest grabbing_hand hand_grab hooded_jacket hoodie imminent_sex inactive_account incest jacket kissing larger_male male male/male male_only monochrome monster monster_boy multiple_views pants_around_legs papyrus papyrus_(undertale) papysans pinned_down sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus toubigaizi twitter uke_sans undead undertale undertale_(series) valentine's_day video_game_character video_games white_background yaoi
2020s 2023 2boys 2d 2d_(artwork) anger_vein animated_skeleton bad_id bad_twitter_id big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male black_and_white blush blush_lines bottom_sans brother brother/brother brother_and_brother brothers cape clothed clothing digital_media_(artwork) duo fontcest grabbing_hand hand_grab hooded_jacket hoodie imminent_sex inactive_account incest jacket kissing larger_male male male/male male_only monochrome monster monster_boy multiple_views pants_around_legs papyrus papyrus_(undertale) papysans pinned_down sans sans_(undertale) seme_papyrus simple_background skeleton small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom text top_papyrus toubigaizi twitter uke_sans undead undertale undertale_(series) valentine's_day video_game_character video_games white_background yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers clothed clothing digital_media_(artwork) drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest incest kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi
2020s 2022 2boys 2d 2d_(artwork) animated_skeleton arms_around_another arms_around_another's_neck artist_name artist_watermark biting biting_shoulder bottom_sans bottomwear brother brother/brother brother_and_brother brothers clothed clothing digital_media_(artwork) drooling duo ectotongue empath__life fontcest grey_background hand_in_pants hand_under_clothes hands_on_another's_chest hands_on_chest incest kissing making_out male male/male male_only monochrome monster monster_boy pants papyrus papyrus_(undertale) papysans partially_clothed partially_nude saliva saliva_on_tongue saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sibling_incest siblings simple_background skeleton taking_off_clothes tel_a_friend tongue top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressing video_game_character video_games watermark yaoi