1girl absurdres animal_ears black_background blue_hair blurry breasts choker cleavage cowboy_shot crop_top dark-skinned_female dark_skin depth_of_field grin hair_between_eyes hair_ornament hairclip happy_birthday highres hishi_amazon_(umamusume) horse_ears horse_girl horse_tail looking_at_viewer medium_breasts midriff miniskirt navel ni_kogori outstretched_arm pointing red_eyes shirt single_sleeve skirt smile solo sweat tail umamusume white_skirt