1girl, animal_ears, dress, from_behind, gloves, greyscale, horse_ears, horse_girl, horse_tail, king_halo_(umamusume), koruri, long_hair, looking_away, looking_to_the_side, monochrome, off-shoulder_dress, off_shoulder, simple_background, solo, swept_bangs, tail, tail_through_clothes, twitter_username, umamusume, wavy_hair, white_background