Rule 34 Dev - 1:1 1:1_aspect_ratio 2010s 2015 2d 2d_(artwork) 3boys ahegao animated_skeleton assisted_fellatio assisted_sex blue_tongue bondage bottom_sans bound brother_penetrating_brother brothers cum cum_in_mouth cum_on_face cum_on_tongue digital_media_(artwork) ectopenis flowans flowey_the_flower flowsans fontcest gay genitals goopynoms incest male male/male male/male/male male_only male_penetrating monochrome monster mouth_forced_open orange_cum orange_penis papyrus papyrus_(undertale) papysans partially_colored sans sans_(undertale) seme_papyrus sex skeleton tongue_out top_papyrus trio uke_sans undead undertale undertale_(series) unseen_male_face video_game_character video_games yaoi|1022179

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