1girl, animal_ears, barefoot, brown_hair, chibi, closed_eyes, closed_mouth, full_body, hair_over_one_eye, horse_ears, horse_girl, horse_tail, long_hair, lying, mopiwo, on_back, outstretched_arms, red_shorts, rice_shower_(umamusume), shirt, short_sleeves, shorts, sleeping, solo, spread_arms, tail, towel, tracen_training_uniform, twitter_username, umamusume, wavy_mouth, white_shirt