1girl, animal_ears, bed, blush, breasts, collar, collarbone, hair_between_eyes, hair_ornament, horse_ears, horse_girl, long_hair, low_twintails, medium_breasts, monochrome, mp4_46, pillow, reaching, reaching_towards_viewer, solo, twintails, umamusume, yamanin_zephyr_(umamusume)