yukiya (shiya), eishin flash (umamusume), umamusume, highres, 1girl, animal ears, belt, black hair, black jacket, black necktie, black pants, blue eyes, blush, breasts, brown belt, closed mouth, grey shirt, hair between eyes, hands in pockets, horse ears, horse girl, horse tail, jacket, long sleeves, looking at viewer, medium breasts, necktie, open clothes, open jacket, pants, shirt, short hair, simple background, smile, solo, tail, white background