1girl, alternate costume, animal ears, black hair, blue eyes, blush, breasts, cleavage, closed mouth, collarbone, competition swimsuit, eishin flash (umamusume), hair between eyes, hair ornament, herohero (higashi no dou), horse ears, horse tail, large breasts, looking at viewer, one-piece swimsuit, simple background, smile, swimsuit, tail, umamusume, white background