1girl, animal_ears, arm_behind_back, bikini, black_bikini, black_hair, blue_sky, blush, breasts, cloud, collarbone, day, hair_ornament, horse_ears, horse_girl, horse_tail, kitasan_black_(umamusume), medium_breasts, medium_hair, mitomumitomu, multicolored_hair, navel, outdoors, raised_eyebrows, red_eyes, sky, solo, stomach, streaked_hair, swimsuit, tail, umamusume