1girl, ahoge, animal_ears, ass, beach, bikini, blue_bikini, blue_eyes, blue_sky, blush, breasts, brown_hair, cloud, cloudy_sky, cowboy_shot, day, ear_ornament, from_behind, grey_hairband, hairband, halterneck, hand_on_own_arm, horizon, horse_ears, horse_girl, horse_tail, large_breasts, long_hair, looking_at_viewer, looking_back, mihono_bourbon_(umamusume), nabeshiita_(atsuryoku_nabe), ocean, open_mouth, outdoors, side-tie_bikini_bottom, sky, solo, standing, swimsuit, tail, umamusume