1girl, ahoge, animal_ears, arm_behind_head, arm_up, ass, bare_arms, bare_shoulders, black_one-piece_swimsuit, blue_eyes, blue_sky, blush, border, breasts, brown_hair, cloud, cloudy_sky, day, e20, grey_hairband, grey_one-piece_swimsuit, hair_between_eyes, hairband, horse_ears, horse_girl, horse_tail, long_hair, mihono_bourbon_(umamusume), one-piece_swimsuit, parted_lips, sky, solo, swimsuit, tail, umamusume, very_long_hair, wading, water, white_border