1girl, animal ears, artist self-insert, ascot, bangs, chain, ear ornament, eyes visible through hair, genderswap, genderswap (mtf), greyscale, horse ears, horse girl, jacket, looking at viewer, medium hair, monochrome, original, puffy sleeves, simple background, sketch, solo, umamusume, upper body, white background, yu'nyanko-chan (yu'nyanko), yunekoko