hokuyukis, stay gold (umamusume), umamusume, commentary request, highres, 1girl, alternate costume, animal ears, black hair, blush, breasts, brown eyes, brown hair, closed mouth, collarbone, ear covers, feather hair ornament, feathers, hair between eyes, hair ornament, horse ears, horse girl, horse tail, leotard, long hair, long sleeves, looking at viewer, multicolored hair, pantyhose, simple background, small breasts, smile, solo, streaked hair, tail, white background, white hair, white pantyhose, yellow leotard