1girl, animal_ears, arm_behind_head, arm_up, armpit_focus, armpits, blush, breasts, brown_hair, cleavage, detached_sleeves, dress, horse_ears, layered_dress, long_hair, looking_at_viewer, low_twintails, may9, medium_breasts, multicolored_hair, parted_lips, signature, solo, stretching, twintails, two-tone_hair, umamusume, unfinished, upper_body, yamanin_zephyr_(umamusume), yellow_eyes