1girl, alternate_costume, animal_ears, artist_name, aston_machan_(umamusume), blush, breasts, brown_hair, buruma, green_eyes, gym_uniform, herohero_(higashi_no_dou), horse_ears, horse_girl, horse_tail, jacket, looking_at_viewer, medium_breasts, solo, steaming_body, sweat, tail, thighhighs, tracen_training_uniform, track_jacket, umamusume, white_background