1girl, animal_ears, blush, breasts, brown_hair, cleavage, daiwa_scarlet_(scarlet_nuit_etoile)_(umamusume), daiwa_scarlet_(umamusume), embarrassed, hair_intakes, half_updo, horse_ears, horse_girl, horse_tail, jewelry, key, key_necklace, large_breasts, leaning_forward, long_hair, necklace, official_alternate_costume, official_alternate_hairstyle, open_mouth, red_eyes, ribbon, santa_costume, simple_background, solo, tail, tiara, touko_56, umamusume, very_long_hair, white_background