1girl, animal_ears, bad_pixiv_id, bloomers, blush, bow, bowtie, breasts, brown_eyes, brown_hair, center_frills, chishibuki_hiyoko, frills, hair_bow, high-waist_skirt, horse_ears, horse_girl, looking_to_the_side, medium_hair, open_mouth, pink_skirt, puffy_short_sleeves, puffy_sleeves, shirt, short_sleeves, skirt, small_breasts, smart_falcon_(umamusume), smile, solo, thigh_strap, twintails, umamusume, underwear, waving, white_shirt, wrist_cuffs