1girl, animal_ears, arms_at_sides, bad_twitter_id, bikini, blurry, blurry_background, breasts, closed_mouth, from_behind, horizon, horse_ears, horse_girl, horse_tail, k.s.miracle_(umamusume), long_sleeves, medium_hair, navel, nayuta_ggg, outdoors, rash_guard, small_breasts, solo, swimsuit, tail, umamusume, wading, water