2girls, alternate_hair_length, alternate_hairstyle, animal_ears, black_hair, blush, breasts, casual, detached_sleeves, equinox_(racehorse), hair_between_eyes, hair_ornament, horse_ears, horse_girl, horse_tail, kitasan_black_(umamusume), kyutai_x, long_hair, looking_at_viewer, mother_and_daughter, multiple_girls, open_mouth, red_eyes, shaking, simple_background, sweat, tail, umamusume, white_background