masaki (masaki 470), symboli rudolf (umamusume), umamusume, highres, 1girl, alternate costume, animal ears, blush, breasts, brown hair, closed mouth, green shorts, hair between eyes, horse ears, horse girl, horse tail, long hair, looking at viewer, lying, midriff, multicolored hair, navel, on side, purple eyes, shirt, short sleeves, shorts, simple background, smile, streaked hair, tail, thighs, white hair, white shirt