1girl, ahoge, alternate_costume, animal_ears, black_hair, blush, breasts, cloud, hair_between_eyes, hair_ornament, horse_ears, horse_girl, horse_tail, kitasan_black_(umamusume), looking_at_viewer, medium_breasts, medium_hair, ocean, open_mouth, outdoors, red_eyes, solo, tail, totoki86, umamusume, water_drop