1girl, animal_ears, box, breasts, christmas, daiwa_scarlet_(scarlet_nuit_etoile)_(umamusume), daiwa_scarlet_(umamusume), dress, ear_covers, emerane, fang, gift, gift_box, hair_between_eyes, hair_intakes, horse_ears, horse_girl, large_breasts, long_hair, looking_at_viewer, official_alternate_costume, one_eye_closed, open_mouth, outdoors, red_dress, red_eyes, red_hair, single_ear_cover, skin_fang, smile, solo, tiara, umamusume, very_long_hair