+_+, 1girl, animal_ears, bare_shoulders, blue_one-piece_swimsuit, blue_sky, blush, breasts, brown_eyes, brown_hair, covered_navel, day, horse_ears, horse_girl, horse_tail, huge_breasts, legs_together, long_hair, looking_at_viewer, magister, marvelous_sunday_(umamusume), one-piece_swimsuit, open_mouth, outdoors, pool, poolside, school_swimsuit, sideboob, sky, smile, solo, swimsuit, tail, thighs, tracen_swimsuit, twintails, umamusume, wet