1girl, animal_ears, beach, bikini, black_bikini, blue_eyes, blue_sky, breasts, brown_hair, cleavage, cloud, day, horizon, horse_ears, horse_girl, horse_tail, large_breasts, long_hair, mihono_bourbon_(umamusume), miya_star_saa, mountainous_horizon, ocean, outdoors, sky, solo, swimsuit, tail, umamusume, walking