1girl, alternate_costume, animal_ears, aqua_eyes, ass, beach, bikini, brown_hair, closed_mouth, day, from_behind, hair_ornament, hairclip, herohero_(higashi_no_dou), horse_ears, horse_girl, horse_tail, long_hair, looking_back, mr._c.b._(umamusume), ocean, outdoors, sand, smile, solo, swimsuit, tail, tilted_headwear, umamusume, white_bikini, white_headwear