1girl, animal_ears, aston_machan_(umamusume), bare_arms, bare_shoulders, bikini, blue_sky, blush, breasts, brown_hair, cloud, cowboy_shot, day, green_eyes, hands_up, horse_ears, horse_tail, komb, looking_at_viewer, medium_hair, navel, outdoors, ponytail, red_bikini, sky, smile, solo, standing, stomach, swimsuit, tail, umamusume