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2020s 2023 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media_(artwork) dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting gloves heart heart-shaped_pupils heart_eyes hoodie implied_bottomless implied_penis incest jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans sans_(undertale) seme_papyrus size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta

2020s 2023 2boys 2d 2d_(artwork)animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media_(artwork)dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting gloves heart heart-shaped_pupils heart_eyes hoodie implied_bottomless implied_penis incest jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia monster orange_cum orange_penis papyrus papyrus_(undertale)papysans partially_colored penis purplebluepen45 sans sans_(undertale)seme_papyrus size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus uke_sans undead undertale undertale_(series)unseen_male_face video_game_character video_games yaoi youfoundta

2020s 2023 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male blue_blush blush bottom_sans brother brother/brother brother_and_brother brothers clothed clothing comic comic_panel cum cum_on_head cum_splatter digital_media_(artwork) dominant dominant_male drooling duo ectopenis extreme_size_difference fontcest frotting gloves heart heart-shaped_pupils heart_eyes hoodie implied_bottomless implied_penis incest jacket larger_male macro macrophilia male male/male male_only maledom malesub micro microphilia monster orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored penis purplebluepen45 sans sans_(undertale) seme_papyrus size_difference skeleton slippers small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus soul submissive submissive_male thrusting top_papyrus uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi youfoundta

1:1 1:1_aspect_ratio 1boy 2d 2d_(artwork) animated_skeleton artist_name blue_blush blush bottom_sans clothed clothing digital_media_(artwork) english_text glowing groping hand_on_chest hand_on_face hands implied_masturbation male male_focus male_only malesub monochrome monster multiple_views orgasm_face partially_clothed partially_colored sans sans_(undertale) shirtless sigh simple_background singingsans skeleton solo_focus solo_male submissive submissive_male talking_to_viewer text third-party_source topless topless_male trembling uke_sans undead undertale undertale_(series) video_games

!!! 1:1 1:1_aspect_ratio 1boy 2d 2d_(artwork) ahegao animated_skeleton artist_name blue_blush blush bottom_sans digital_media_(artwork) drooling ectotongue exclamation_mark exclamation_point fangs heart-shaped_pupils heart_eyes male male_ahegao male_focus male_only malesub moan monochrome monster multiple_views open_mouth orgasm_face partially_colored pleasure_face sans sans_(undertale) simple_background singingsans skeleton solo_male submissive submissive_male tears third-party_source tongue tongue_out trembling uke_sans undead undertale undertale_(series) video_games white_background