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1boy 1cuntboy 2020s 2023 2d 2d_(artwork) animated_skeleton balls blue_clitoris blue_pussy blush blushing_male bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clitoris clothed clothing cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male drooling duo ectopenis ectoplasm ectopussy english_text fontcest from_behind_position genitals gloves glowing glowing_genitalia glowing_penis grabbing_legs grey_background incest intraspecies legs_apart male male/cuntboy male_penetrating male_penetrating_cuntboy maledom mellouwana monster monster_boy orange_balls orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis pussy red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton smiling smiling_at_viewer speech_bubble submissive submissive_cuntboy talking talking_to_another talking_to_viewer testicles text text_bubble thank_you top_papyrus uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

1boy 1cuntboy 2020s 2023 2d 2d_(artwork)animated_skeleton balls blue_clitoris blue_pussy blush blushing_male bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clitoris clothed clothing cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork)dominant dominant_male drooling duo ectopenis ectoplasm ectopussy english_text fontcest from_behind_position genitals gloves glowing glowing_genitalia glowing_penis grabbing_legs grey_background incest intraspecies legs_apart male male/cuntboy male_penetrating male_penetrating_cuntboy maledom mellouwana monster monster_boy orange_balls orange_penis orange_testicles papyrus papyrus_(undertale)papysans partially_clothed partially_clothed_male penetration penis pussy red_gloves sans sans_(undertale)seme_papyrus sex sibling_incest siblings simple_background skeleton smiling smiling_at_viewer speech_bubble submissive submissive_cuntboy talking talking_to_another talking_to_viewer testicles text text_bubble thank_you top_papyrus uke_sans undead undertale undertale_(series)vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

1boy 1cuntboy 2020s 2023 2d 2d_(artwork) animated_skeleton balls blue_clitoris blue_pussy blush blushing_male bottom_sans bottomless bottomless_male brother brother/brother brother_and_brother brother_penetrating_brother brothers clitoris clothed clothing cuntboy cuntboy_penetrated cuntboysub digital_media_(artwork) dominant dominant_male drooling duo ectopenis ectoplasm ectopussy english_text fontcest from_behind_position genitals gloves glowing glowing_genitalia glowing_penis grabbing_legs grey_background incest intraspecies legs_apart male male/cuntboy male_penetrating male_penetrating_cuntboy maledom mellouwana monster monster_boy orange_balls orange_penis orange_testicles papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penis pussy red_gloves sans sans_(undertale) seme_papyrus sex sibling_incest siblings simple_background skeleton smiling smiling_at_viewer speech_bubble submissive submissive_cuntboy talking talking_to_another talking_to_viewer testicles text text_bubble thank_you top_papyrus uke_sans undead undertale undertale_(series) vaginal vaginal_penetration vaginal_sex video_game_character video_games yaoi

1boy 2d 2d_(artwork) animated_skeleton arm_support biting_clothes biting_shirt blue_blush blue_penis blush bulge bulge_under_clothes digital_media_(artwork) doiduh ectopenis glowing glowing_genitalia glowing_penis looking_up male male_only malesub monster monster_boy penis penis_bulge penis_peek precum sans sans_(undertale) skeleton solo_male source_request submissive submissive_male sweat undead undertale undertale_(series) video_game_character video_games white_background

1boy after_masturbation animated_skeleton artist_request blue_penis clothed clothing comic_sans cum cum_on_clothes cum_on_self ectopenis glowing glowing_eye glowing_genitalia glowing_penis hooded_jacket hoodie jacket male male_only monochrome monster partially_colored sans sans_(undertale) skeleton solo_male sweat text trembling undead undertale undertale_(series)