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2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothing covering_mouth covering_own_mouth crying digital_media_(artwork) drooling duo ectopenis english_text evilbeetle eye_fucking eye_penetration fellatio fontcest genitals gloves heart-shaped_pupils heart_eyes holding_hands hooded_jacket hoodie incest intraspecies jacket male male/male male_only monster monster_boy multiple_views oral orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_in_eye penis_in_mouth penis_through_clothing red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skull_fucking soul soul_sex sucking_penis tears text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

2020s 2022 2boys 2d 2d_(artwork)animated_skeleton artist_name beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothing covering_mouth covering_own_mouth crying digital_media_(artwork)drooling duo ectopenis english_text evilbeetle eye_fucking eye_penetration fellatio fontcest genitals gloves heart-shaped_pupils heart_eyes holding_hands hooded_jacket hoodie incest intraspecies jacket male male/male male_only monster monster_boy multiple_views oral orange_blush orange_penis papyrus papyrus_(undertale)papysans penis penis_in_eye penis_in_mouth penis_through_clothing red_gloves sans sans_(undertale)seme_papyrus sex sibling_incest siblings simple_background skeleton skull_fucking soul soul_sex sucking_penis tears text top_papyrus twitter uke_sans undead undertale undertale_(series)video_game_character video_games yaoi

2020s 2022 2boys 2d 2d_(artwork) animated_skeleton artist_name beetleevil blue_blush blue_hoodie blue_jacket blush blushing_male bottom_sans brother brother/brother brother_and_brother brothers clothed clothing covering_mouth covering_own_mouth crying digital_media_(artwork) drooling duo ectopenis english_text evilbeetle eye_fucking eye_penetration fellatio fontcest genitals gloves heart-shaped_pupils heart_eyes holding_hands hooded_jacket hoodie incest intraspecies jacket male male/male male_only monster monster_boy multiple_views oral orange_blush orange_penis papyrus papyrus_(undertale) papysans penis penis_in_eye penis_in_mouth penis_through_clothing red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton skull_fucking soul soul_sex sucking_penis tears text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi

2020s 2021 2boys 2d 2d_(artwork) absurd_res animated_skeleton artist_name black_bottomwear black_clothing black_pants blue_blush blue_clothing blue_eye blue_hoodie blue_jacket blue_penis blue_topwear blush blush_lines blushing_male bodily_fluids bone boots bottom_sans bottomwear brother brother/brother brother_and_brother brothers candy candy_cane christmas christmas_clothing christmas_headwear christmas_sweater christmas_topwear clothed clothing covering_mouth covering_own_mouth dessert digital_media_(artwork) dominant dominant_male duo ectopenis ectoplasm ectotongue english_text fluids fontcest food food_fetish food_insertion food_play footwear ganzooky genital_fluids genitals gloves glowing glowing_eye green_background greeting_card hand_on_mouth hat headgear headwear hi_res holidays hooded_jacket hoodie improvised_sex_toy incest intraspecies jacket legs_apart male male/male male_only maledom malesub merry_christmas monster monster_boy nsfwsinningsans object_insertion orange_blush orange_tongue pants papyrus papyrus_(undertale) papysans pattern_bottomwear pattern_clothing pattern_pants penis pink_footwear pink_slippers precum red_boots red_clothing red_footwear red_gloves red_ribbon ribbon ribbon_on_penis sans sans_(undertale) santa_hat seme_papyrus sibling_incest siblings sitting skeleton slippers snow socks sounding spread_legs striped_bottomwear striped_clothing striped_pants stripes submissive submissive_male sweater text tongue tongue_out top_papyrus topwear translucent_penis two-tone_background uke_sans undead undertale undertale_(series) urethral urethral_insertion video_games white_border yaoi

2020 2020s 2boys 2d 2d_(artwork) animated_skeleton beetleevil blue_blush blue_flower blush bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers completely_nude completely_nude_male covering_mouth covering_own_mouth digital_media_(artwork) duo echo_flower ectopenis ectoplasm english_text evilbeetle finger_to_mouth flower fontcest genitals hand_on_mouth heart-shaped_pupils heart_eyes incest intraspecies kneel male male/male male_penetrating monster monster_boy nude nude_male orange_blush orange_penis outdoor_sex outdoors papyrus papyrus_(undertale) papysans penetration penis plant public public_sex sans sans_(undertale) seme_papyrus sex shh sibling_incest siblings skeleton stealth_sex text top_papyrus twitter uke_sans undead undertale undertale_(series) video_game_character video_games yaoi