1girl, animal_ears, arms_behind_back, black_hair, breasts, cleavage, collarbone, competition_school_swimsuit, cowboy_shot, horse_ears, horse_girl, horse_tail, indoors, kitasan_black_(umamusume), kouhaku_nawa, large_breasts, multicolored_hair, one-piece_swimsuit, pool, red_eyes, rope, school_swimsuit, shimenawa, short_hair, solo, streaked_hair, swimsuit, tail, umamusume, waity_awa, wet, wet_clothes, wet_swimsuit