This post belongs to a parent post. Child posts are often subsequent pages of a doujinshi, or minor variations of the parent post.


1boy 1cuntboy 2010s 2016 2d 2d_(artwork) animated_skeleton blanket bottom_sans brother brother/brother brother_and_brother brother_penetrating_brother brothers comic comic_page couch couch_sex cum cum_in_pussy cuntboy cuntboysub digital_media_(artwork) dominant_male duo ectopenis ectopussy edit edited eli-sin-g english_text fontcest from_front_position imminent_sex incest intraspecies kolesjoie long_image male male/cuntboy male_penetrating maledom monster monster_boy multiple_images papyrus papyrus_(font) papyrus_(undertale) papysans pussy sans sans_(undertale) seme_papyrus sequence sequential sex sibling_incest siblings skeleton sofa submissive_cuntboy tall_image text third-party_edit top_papyrus tumblr uke_sans undead undertale undertale_(series) veiny_penis video_games yaoi