Rule 34 Dev - anthro anus avian balls beak big_anus biped bird black_body blush demon feathers genitals grey_body hair heart_symbol helluva_boss hi_res huge_anus male male_only markmanez open_mouth owl puffy_anus rear_view red_eyes simple_background slap_mark solo stolas_(helluva_boss) tail tail_feathers white_background|12612191688