1girl, alternate_costume, animal_ears, arms_up, ass, black_one-piece_swimsuit, blue_hair, braid, breasts, casual_one-piece_swimsuit, closed_mouth, cloud, cowboy_shot, crown_braid, frilled_one-piece_swimsuit, frilled_swimsuit, frills, herohero_(higashi_no_dou), horse_ears, horse_girl, horse_tail, large_breasts, long_hair, looking_at_viewer, looking_to_the_side, mejiro_ardan_(umamusume), one-piece_swimsuit, outdoors, purple_eyes, smile, solo, split_mouth, swimsuit, tail, umamusume