1girl, animal_ears, blue_hair, blue_one-piece_swimsuit, blue_sky, braid, breasts, cloud, competition_school_swimsuit, crown_braid, day, horizon, horse_ears, horse_girl, horse_tail, large_breasts, long_hair, lying, mejiro_ardan_(umamusume), ocean, on_side, one-piece_swimsuit, outdoors, partially_submerged, purple_eyes, school_swimsuit, sky, solo, swimsuit, tail, umamusume, waity_awa, wet, wet_clothes, wet_swimsuit