1girl, ahoge, alternate_costume, animal_ears, black_hair, blush, breasts, cleavage, collarbone, hair_ornament, hat, horse_ears, horse_girl, horse_tail, kitasan_black_(umamusume), looking_at_viewer, medium_breasts, medium_hair, navel, ocean, one_eye_closed, outdoors, sand, shorts, sky, solo, straw_hat, sunny_(20597521), swimsuit, tail, umamusume