yamaboshi ryuu, kitasan black (umamusume), umamusume, commentary request, 1girl, ahoge, animal ears, bikini, black bikini, black hair, black tail, blush, breasts, cleavage, closed mouth, elbow rest, fan request, hair between eyes, hand on own cheek, hand on own face, head rest, horse ears, horse girl, horse tail, large breasts, looking at viewer, lying, marshmallow (site), mismatched bikini, multicolored hair, navel, on side, red eyes, request inset, short hair, side-tie bikini bottom, simple background, smile, solo, stomach, streaked hair, swimsuit, tail, thighs, two side up, white background, white streaks, yellow bikini