2girls, animal_ears, bouncing_breasts, breasts, cleavage, collar, collarbone, eishin_flash_(umamusume), greyscale, horse_ears, horse_girl, horse_tail, long_hair, medium_breasts, monochrome, multiple_girls, ryoji_(nomura_ryouji), surprised, tail, thighhighs, umamusume, walking, yamanin_zephyr_(umamusume)