1girl, ahoge, animal_ears, ass, blue_eyes, blue_one-piece_swimsuit, character_name, competition_school_swimsuit, from_behind, horse_ears, horse_girl, horse_tail, long_hair, looking_back, oguri_cap_(umamusume), one-piece_swimsuit, school_swimsuit, shigino_sohuzi, simple_background, solo, swimsuit, tail, tracen_swimsuit, umamusume, wading, water, white_background, white_hair