Rule 34 Dev - 1boy 2021 anthro asriel_dreemurr asriel_dreemurr_(god_form) ass backsack balls boss_monster bovid bulluppa caprine digital_media_(artwork) fur genitals goat hand_on_butt hi_res horn male male_only mammal nude short_tail simple_background solo undertale undertale_(series) video_games white_background white_body white_fur|6346603224