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2020 2020s 2boys 2d anal animated_skeleton artist_name artist_signature blush bottom_sans closed_eyes completely_nude completely_nude_male digital_media_(artwork) drooling duo elemental_creature elemental_humanoid facing_another fire_elemental from_front_position grillby grillsans humanoid male male/male male_focus male_only mastery_position monster monster_boy nude nude_male orange_body penetration sans sans_(undertale) seme_grillby sex skeleton skerbbie top_grillby twitter uke_sans undead undertale undertale_(series) white_background yaoi
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2010s 2016 2boys 2d animated_skeleton bigger_male bottom_sans clothed clothed/nude clothing completely_naked completely_nude digital_media_(artwork) duo elemental_creature elemental_humanoid eyewear facing_another fire_elemental glasses grillby grillsans humanoid jipshin larger_male looking_at_another male male_only monochrome monster monster_boy nude sans sans_(undertale) seme_grillby simple_background sitting sitting_on_another sitting_on_lap skeleton smaller_male top_grillby uke_sans undead undertale undertale_(series) white_background yaoi
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2010s 2019 2boys 2d 2d_(artwork) animated_skeleton bigger_male bottom_sans clothed clothed_male digital_media_(artwork) duo elemental_creature elemental_humanoid fire_elemental gay grillby grillsans humanoid larger_male male male/male male_only monochrome monster monster_boy sans sans_(undertale) seme_grillby simple_background size_difference skeleton top_grillby tumblr uke_sans undead undertale undertale_(series) ut-2828282928 video_games white_background yaoi
2010s 2019 2boys 2d 2d_(artwork) animated_skeleton bigger_male bottom_sans clothed clothed_male digital_media_(artwork) duo elemental_creature elemental_humanoid fire_elemental gay grillby grillsans humanoid larger_male male male/male male_only monochrome monster monster_boy sans sans_(undertale) seme_grillby simple_background size_difference skeleton top_grillby tumblr uke_sans undead undertale undertale_(series) ut-2828282928 video_games white_background yaoi
2010s 2019 2boys 2d 2d_(artwork) animated_skeleton bigger_male bottom_sans bottomless digital_media_(artwork) duo elemental_creature elemental_humanoid fire_elemental gay grillby grillsans humanoid korean_text larger_male male male/male male_only monochrome monster monster_boy red_theme sans sans_(undertale) seme_grillby simple_background size_difference skeleton speech_bubble text top_grillby tumblr uke_sans undead undertale undertale_(series) ut-2828282928 video_game_character video_games white_background yaoi
2010s 2019 2boys 2d 2d_(artwork) animated_skeleton bigger_male bottom_sans bottomless digital_media_(artwork) duo elemental_creature elemental_humanoid fire_elemental gay grillby grillsans humanoid korean_text larger_male male male/male male_only monochrome monster monster_boy red_theme sans sans_(undertale) seme_grillby simple_background size_difference skeleton speech_bubble text top_grillby tumblr uke_sans undead undertale undertale_(series) ut-2828282928 video_game_character video_games white_background yaoi
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2010s 2015 2boys 2d 2d_(artwork) anal animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blue_tongue blush bottom_sans bottomless bottomless_male clothed digital_media_(artwork) duo ectotongue elemental_creature elemental_humanoid fire_elemental gay grillby grillsans humanoid ladybumtickler larger_male larger_penetrating larger_penetrating_smaller male male/male male_only monster monster_boy orange_body orange_penis partially_clothed partially_clothed_male penis sans sans_(undertale) seme_grillby sex simple_background skeleton small_sub small_sub_big_dom smaller_penetrated smaller_sub smaller_sub_bigger_dom sniggysmut top_grillby uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi
2010s 2019 2boys 2d animated_skeleton bottom_sans comic_sans digital_media_(artwork) duo elemental_creature elemental_humanoid english_text fellatio fire_elemental gay grillby grillsans humanoid male male/male male_only mellednsfw monster monster_boy orange_body sans sans_(undertale) seme_grillby skeleton solo_focus speech_bubble text top_grillby uke_sans undead undertale undertale_(series) unseen_male_face yaoi
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