1girl, animal_ears, arm_under_breasts, aston_machan_(umamusume), bare_shoulders, breasts, brown_hair, cleavage, cowboy_shot, horse_ears, large_breasts, looking_at_viewer, naked_towel, outdoors, short_hair, side_ponytail, solo, standing, tail, towel, umamusume, uu-tan_(hushigi10), yellow_eyes