1girl, animal_ears, beret, braid, breasts, cleavage, hat, heavy_breathing, hokko_tarumae_(umamusume), horse_ears, horse_girl, horse_tail, large_breasts, long_hair, looking_at_viewer, majingnmzl, monochrome, navel, open_mouth, panties, solo, tail, thighhighs, twin_braids, umamusume, underboob, underwear