Rule 34 Dev - 2023 anthro artist_name big_penis boss_monster bovid caprine clothed clothing digital_media_(artwork) foreskin ftg_crossgender fti_crossgender futa_focus futa_only futanari genitalshi_res huge_cock intersex kyurisawa mammal monochrome penis solo solo_futa toriel undertale undertale_(series) undertale_futanari|9424811600