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2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton arm_grab big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines boots bottom_sans bottomless bottomless_male brother/brother brother_and_brother brother_penetrating_brother brothers cussing dirty_talk drooling duo ectopenis english_text fontcest from_behind_position genital_fluids genitals gloves grabbing_arms grabbing_from_behind hi_res high_res highres humanoid incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monochrome monster monster_boy nude nude_male onomatopoeia pants_around_one_leg papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis penis_size_difference prison_guard_position profanity sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background size_difference skeleton sketch small_penis small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing talking_to_another talking_to_partner text thrusting tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi

2020s 2023 2boys 2d 2d_(artwork)anal animated_skeleton arm_grab big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines boots bottom_sans bottomless bottomless_male brother/brother brother_and_brother brother_penetrating_brother brothers cussing dirty_talk drooling duo ectopenis english_text fontcest from_behind_position genital_fluids genitals gloves grabbing_arms grabbing_from_behind hi_res high_res highres humanoid incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monochrome monster monster_boy nude nude_male onomatopoeia pants_around_one_leg papyrus papyrus_(undertale)papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis penis_size_difference prison_guard_position profanity sans sans_(undertale)seme_papyrus sex sex_from_behind sibling_incest siblings simple_background size_difference skeleton sketch small_penis small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing talking_to_another talking_to_partner text thrusting tired_but_horny_(artist)top_papyrus twitter uke_sans undead undertale undertale_(series)veiny_penis video_game_character video_games white_background yaoi

2020s 2023 2boys 2d 2d_(artwork) anal animated_skeleton arm_grab big_dom big_dom_small_sub big_penis bigger_dom bigger_dom_smaller_sub bigger_male bigger_penetrating bigger_penetrating_smaller blush blush_lines boots bottom_sans bottomless bottomless_male brother/brother brother_and_brother brother_penetrating_brother brothers cussing dirty_talk drooling duo ectopenis english_text fontcest from_behind_position genital_fluids genitals gloves grabbing_arms grabbing_from_behind hi_res high_res highres humanoid incest intraspecies larger_male larger_penetrating larger_penetrating_smaller male male/male male_only male_penetrating male_penetrating_male monochrome monster monster_boy nude nude_male onomatopoeia pants_around_one_leg papyrus papyrus_(undertale) papysans partially_clothed partially_clothed_male penetration penetration_from_behind penis penis_size_difference prison_guard_position profanity sans sans_(undertale) seme_papyrus sex sex_from_behind sibling_incest siblings simple_background size_difference skeleton sketch small_penis small_sub small_sub_big_dom smaller_male smaller_penetrated smaller_sub smaller_sub_bigger_dom swearing talking_to_another talking_to_partner text thrusting tired_but_horny_(artist) top_papyrus twitter uke_sans undead undertale undertale_(series) veiny_penis video_game_character video_games white_background yaoi

1:1 1:1_aspect_ratio 2020 2020s 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bottom_sans crying crying_with_eyes_open darkner deltarune deltarune_chapter_1 duo gay king_spade larger_male male/male male_only monster non-con non-consensual noncon nonconsensual nude nude_male sans sans_(undertale) size_difference skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom solo_focus stomach_mouth sympharin symphysins tears uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi

2020 2020s 2boys 2d 2d_(artwork) animated_skeleton big_dom big_dom_small_sub bigger_dom bigger_dom_smaller_sub bottom_sans clothed darkner deltarune deltarune_chapter_1 duo gay imminent_rape king_spade larger_male male/male male_only monster non-con non-consensual noncon nonconsensual sans sans_(undertale) size_difference skeleton sketch small_sub small_sub_big_dom smaller_male smaller_sub smaller_sub_bigger_dom stomach_mouth sympharin symphysins uke_sans undead undertale undertale_(series) video_game_character video_games white_background yaoi