naka_ushiro, akikawa_yayoi_(umamusume), year_2024, 1girl, alternate_costume, animal_ears, blush, breasts, closed_eyes, collarbone, covered_navel, horse_ears, horse_girl, horse_tail, looking_at_viewer, open_mouth, ponytail, school_swimsuit, sky, small_breasts, solo, swimsuit, tail, v, commentary_request, highres, umamusume