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2010s 2017 2boys 2d 2d_(artwork) ahegao anal animated_skeleton announcing_orgasm artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media_(artwork) drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english_text fontcest from_front_position gloves hat holidays incest interlocked_fingers intertwined_fingers intraspecies large_filesize legwear long_image making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy multiple_images orgasm papyrus papyrus_(undertale) papysans partially_colored penetration red_blush red_penis red_tongue removing_glove saliva saliva_trail sans sans_(undertale) santa_costume santa_hat scarf seme_papyrus sequence sequential sex short_skirt sibling_incest siblings skeleton skirt sofa stockings talking tall_image tears text third-party_edit thornisicezins thrusting tongue top_papyrus topwear touching_crotch tumblr tumblr_username typo uke_sans undead undertale undertale_(series) video_games wink yaoi

2010s 2017 2boys 2d 2d_(artwork)ahegao anal animated_skeleton announcing_orgasm artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media_(artwork)drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english_text fontcest from_front_position gloves hat holidays incest interlocked_fingers intertwined_fingers intraspecies large_filesize legwear long_image making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy multiple_images orgasm papyrus papyrus_(undertale)papysans partially_colored penetration red_blush red_penis red_tongue removing_glove saliva saliva_trail sans sans_(undertale)santa_costume santa_hat scarf seme_papyrus sequence sequential sex short_skirt sibling_incest siblings skeleton skirt sofa stockings talking tall_image tears text third-party_edit thornisicezins thrusting tongue top_papyrus topwear touching_crotch tumblr tumblr_username typo uke_sans undead undertale undertale_(series)video_games wink yaoi

2010s 2017 2boys 2d 2d_(artwork) ahegao anal animated_skeleton announcing_orgasm artist_name blue_blush blue_tongue blush boots bottom_sans bottomless_skirt brother brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media_(artwork) drooling duo ectopenis ectoplasm ectotongue edit edited ejaculation english_text fontcest from_front_position gloves hat holidays incest interlocked_fingers intertwined_fingers intraspecies large_filesize legwear long_image making_out male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy multiple_images orgasm papyrus papyrus_(undertale) papysans partially_colored penetration red_blush red_penis red_tongue removing_glove saliva saliva_trail sans sans_(undertale) santa_costume santa_hat scarf seme_papyrus sequence sequential sex short_skirt sibling_incest siblings skeleton skirt sofa stockings talking tall_image tears text third-party_edit thornisicezins thrusting tongue top_papyrus topwear touching_crotch tumblr tumblr_username typo uke_sans undead undertale undertale_(series) video_games wink yaoi

2010s 2017 2boys 2d 2d_(artwork) ahegao anal animated_skeleton announcing_orgasm blue_blush blue_tongue blush bottom_sans bottomless_skirt brother brother/brother brother_penetrating_brother brothers christmas christmas_outfit clothed clothing comic comic_page comic_panel couch couch_sex crossdressing cum digital_media_(artwork) duo ectopenis ectoplasm ectotongue ejaculation english_text fontcest holidays incest interlocked_fingers intertwined_fingers intraspecies legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy orgasm papyrus papyrus_(undertale) papysans partially_colored red_blush red_penis sans sans_(undertale) santa_costume scarf seme_papyrus sequence sequential sex sibling_incest siblings skeleton skirt sofa stockings sweat talking tears text thornisicezins tongue top_papyrus topwear typo uke_sans undead undertale undertale_(series) video_games yaoi

2010s 2017 2boys 2d 2d_(artwork) anal animated_skeleton blue_blush blush bottom_sans bottomless_skirt brother brother/brother brother_penetrating_brother brothers christmas christmas_hat christmas_outfit clothed clothing comic comic_page comic_panel couch crossdressing digital_media_(artwork) drooling duo english_text fontcest from_front_position hat holidays incest intraspecies legwear male male/male male_only male_penetrated male_penetrating male_penetrating_male merry_christmas midriff missionary_position monochrome monster monster_boy papyrus papyrus_(undertale) papysans partially_colored penetration red_blush sans sans_(undertale) santa_costume santa_hat scarf seme_papyrus sequence sequential sex sibling_incest siblings skeleton skirt sofa stockings talking text thornisicezins thrusting top_papyrus topwear uke_sans undead undertale undertale_(series) video_games yaoi