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2010s 2boys 2d 2d_(artwork)anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing collar comic comic_page comic_panel digital_media_(artwork)edit edited eli-sin-g english_text fangs fontcest incest intraspecies kolesjoie larger_male larger_penetrating larger_penetrating_smaller long_image male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy multiple_images papyrus papyrus_(undertale)papysans penetration sans sans_(undertale)seme_papyrus sequence sequential service_top sex sibling_incest siblings skeleton smaller_male smaller_penetrated speech_bubble sweat talking tall_image text text_bubble third-party_edit top_papyrus uke_sans undead undertale undertale_(series)video_games yaoi

2010s 2boys 2d 2d_(artwork) anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing collar comic comic_page comic_panel digital_media_(artwork) edit edited eli-sin-g english_text fangs fontcest incest intraspecies kolesjoie larger_male larger_penetrating larger_penetrating_smaller long_image male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy multiple_images papyrus papyrus_(undertale) papysans penetration sans sans_(undertale) seme_papyrus sequence sequential service_top sex sibling_incest siblings skeleton smaller_male smaller_penetrated speech_bubble sweat talking tall_image text text_bubble third-party_edit top_papyrus uke_sans undead undertale undertale_(series) video_games yaoi

2010s 2boys anal animated_skeleton bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines bottom_on_top bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers clothed clothing collar comic comic_page comic_panel eli-sin-g english_text fangs fontcest incest intraspecies kolesjoie larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrated male_penetrating male_penetrating_male monster monster_boy papyrus papyrus_(undertale) papysans penetration sans sans_(undertale) seme_papyrus sequence sequential service_top sex sibling_incest siblings skeleton smaller_male smaller_penetrated speech_bubble sweat text text_bubble top_papyrus uke_sans undead undertale undertale_(series) yaoi

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