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! !? ... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males after_sex all_fours anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck bedroom bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel comic_sans completely_nude completely_nude_male crying cum cum_on_sheets digital_media_(artwork) doggy_position drooling duo ectopenis ectotongue edit edited ejaculation english_text extremely_large_filesize fontcest from_behind_position genitals glowing_eye hand_on_another's_chest hand_on_chest handjob handjob_while_penetrating hands_around_neck hugged_from_behind hugging incest indoors kissing kissing_cheek large_filesize larger_male larger_penetrating larger_penetrating_smaller laying_down licking_neck licking_tongue long_image looking_at_another looking_at_partner lying_down making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male monster multiple_images nude nude_male orange_blush orange_eye orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penetration_from_behind penis saliva_string saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sex sex_from_behind shirt_removed shorter_male skeleton sleeping sleeping_nude sleeping_together smaller_male smaller_penetrated soul soul_sex speech_bubble spoken_ellipsis spoken_exclamation_mark spoken_exclamation_point taking_off_clothes talking talking_to_another tall_image taller_male tears text text_bubble third-party_edit tongue tongue_out top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressed undressing undressing_another undressing_partner video_game_character video_games wake_up yaoi zzz

!!?...13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork)2males after_sex all_fours anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck bedroom bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel comic_sans completely_nude completely_nude_male crying cum cum_on_sheets digital_media_(artwork)doggy_position drooling duo ectopenis ectotongue edit edited ejaculation english_text extremely_large_filesize fontcest from_behind_position genitals glowing_eye hand_on_another's_chest hand_on_chest handjob handjob_while_penetrating hands_around_neck hugged_from_behind hugging incest indoors kissing kissing_cheek large_filesize larger_male larger_penetrating larger_penetrating_smaller laying_down licking_neck licking_tongue long_image looking_at_another looking_at_partner lying_down making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male monster multiple_images nude nude_male orange_blush orange_eye orange_penis orange_tongue orgasm papyrus papyrus_(undertale)papysans partially_clothed partially_clothed_male partially_colored penetration penetration_from_behind penis saliva_string saliva_trail sans sans_(undertale)seme_papyrus sequence sequential sex sex_from_behind shirt_removed shorter_male skeleton sleeping sleeping_nude sleeping_together smaller_male smaller_penetrated soul soul_sex speech_bubble spoken_ellipsis spoken_exclamation_mark spoken_exclamation_point taking_off_clothes talking talking_to_another tall_image taller_male tears text text_bubble third-party_edit tongue tongue_out top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series)undressed undressing undressing_another undressing_partner video_game_character video_games wake_up yaoi zzz

! !? ... 13thcatofthegate 2010s 2018 2boys 2d 2d_(artwork) 2males after_sex all_fours anal animated_skeleton arms_around_another arms_around_another's_neck arms_around_neck bedroom bigger_male bigger_penetrating bigger_penetrating_smaller blue_blush blue_cum blue_eye blue_penis blue_tongue blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothed_male comic comic_page comic_panel comic_sans completely_nude completely_nude_male crying cum cum_on_sheets digital_media_(artwork) doggy_position drooling duo ectopenis ectotongue edit edited ejaculation english_text extremely_large_filesize fontcest from_behind_position genitals glowing_eye hand_on_another's_chest hand_on_chest handjob handjob_while_penetrating hands_around_neck hugged_from_behind hugging incest indoors kissing kissing_cheek large_filesize larger_male larger_penetrating larger_penetrating_smaller laying_down licking_neck licking_tongue long_image looking_at_another looking_at_partner lying_down making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male monster multiple_images nude nude_male orange_blush orange_eye orange_penis orange_tongue orgasm papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male partially_colored penetration penetration_from_behind penis saliva_string saliva_trail sans sans_(undertale) seme_papyrus sequence sequential sex sex_from_behind shirt_removed shorter_male skeleton sleeping sleeping_nude sleeping_together smaller_male smaller_penetrated soul soul_sex speech_bubble spoken_ellipsis spoken_exclamation_mark spoken_exclamation_point taking_off_clothes talking talking_to_another tall_image taller_male tears text text_bubble third-party_edit tongue tongue_out top_papyrus topless topless_male twitter uke_sans undead undertale undertale_(series) undressed undressing undressing_another undressing_partner video_game_character video_games wake_up yaoi zzz

2010s 2019 2boys animated_skeleton arm_support beetleevil blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers closed_eyes clothed clothing crotch_rub duo ectotongue erection erection_under_clothes erection_under_pants evilbeetle fontcest glowing glowing_genitalia grey_background grope_from_behind groping groping_from_behind hand_on_crotch hand_under_clothes hand_under_shirt incest intraspecies licking licking_neck male male/male male_only monochrome monster monster_boy one_eye_closed orange_blush orange_tongue papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sibling_incest siblings simple_background skeleton tongue top_papyrus touching_crotch uke_sans undead undertale undertale_(series) yaoi

2010s 2016 2boys 2d 2d_(artwork) amortem-kun animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blue_hoodie blue_jacket blue_slippers blush boots bottom_sans brother brother/brother brother_and_brother brothers chair clothed clothing couch digital_media_(artwork) duo ectotongue fontcest formal formal_clothes formal_wear furniture gloves green_couch hand_in_pocket hands_on_hips height_difference hooded_jacket hoodie incest jacket kissing larger_male licking licking_neck male male/male male_only monster monster_boy multiple_views neck_tie necktie necktie_grab orange_blush orange_necktie orange_tongue papyrus papyrus_(undertale) papysans red_boots red_gloves sans sans_(undertale) seme_papyrus shoes shorter_male sibling_incest siblings simple_background sitting_on_couch sitting_on_sofa size_difference skeleton slippers small_sub smaller_male smaller_sub smaller_sub_bigger_dom sofa standing standing_on_chair standing_on_stool stool suit taller_male top_papyrus uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi