1girl, kitasan black \(umamusume\), horse ears, animal ears, red eyes, solo, ball, swimsuit, horse tail, tail, beachball, horse girl, black hair, bikini, navel, cloud, ahoge, looking at viewer, multicolored hair, black bikini, holding ball, holding, outdoors, streaked hair, sky, water, wading, white hair, red ribbon, breasts, blush, blue sky, holding beachball, short hair