prefacegrim, narita taishin (umamusume), umamusume, absurdres, commentary, commission, english commentary, highres, 1girl, animal ears, artist name, ass, barefoot, bed, bedroom, blue eyes, bookshelf, breasts, brown hair, completely nude, feet, from behind, horse ears, horse tail, indoors, lying, nipples, nude, on bed, on stomach, open mouth, pussy, short hair, shoulder blades, small breasts, solo, tail, television, window