Rule 34 Dev - 2019 2boys 2d ambiguous_penetration animated_skeleton arm_around_another's_neck arm_around_neck arm_support artist_name beetleevil blue_blush blush bottom_sans brother/brother brothers clothed clothed_male clothing digital_media duo english_text evilbeetle fontcest grabbing_sheets gripping_sheets implied_penetration implied_sex incest intraspecies jacket legs_around_partner legs_around_waist lineart male/male male_only monster monster_boy orange_blush pants pants_around_one_leg papyrus_(undertale) papysans partially_colored penetration sans_(undertale) scarf sex sibling_incest siblings skeleton socks teeth text top_papyrus undead undertale undertale_(series) white_background yaoi|1028107

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