1girl, animal_ears, bare_shoulders, blue_thighhighs, breasts, brown_eyes, closed_mouth, from_behind, gradient_background, grey_background, horse_ears, horse_girl, horse_tail, long_hair, looking_at_viewer, low_twintails, medium_breasts, sdwing, skirt, smile, solo, standing, tail, thighhighs, thighs, twintails, umamusume, very_long_hair, white_skirt, yamanin_zephyr_(umamusume), zettai_ryouiki