2girls, animal_ears, artist_name, bad_pixiv_id, barefoot, blue_one-piece_swimsuit, breasts, brown_hair, competition_school_swimsuit, covered_navel, day, frown, half-closed_eye, horse_ears, horse_girl, horse_tail, hugging_own_legs, kickboard, large_breasts, leaning_back, looking_at_another, medium_hair, meisho_doto_(umamusume), multicolored_hair, multiple_girls, one-piece_swimsuit, one_eye_closed, open_mouth, orange_hair, outdoors, parted_lips, purple_eyes, quatraise, school_swimsuit, shadow, short_hair, signature, sitting, small_breasts, smile, streaked_hair, sweat, swept_bangs, swimsuit, t.m._opera_o_(umamusume), tail, thigh_gap, tracen_swimsuit, twitter_username, umamusume, wet, white_hair