1girl, animal_ears, bare_shoulders, black_thighhighs, breasts, christmas, christmas_lights, christmas_ornaments, circlet, cleavage, closed_mouth, daiwa_scarlet_(scarlet_nuit_etoile)_(umamusume), daiwa_scarlet_(umamusume), dress, gloves, horse_ears, horse_girl, indoors, long_hair, looking_at_viewer, merry_christmas, nekosuzu_an, night, night_sky, orange_eyes, orange_hair, red_dress, red_gloves, santa_costume, sky, smile, snowing, solo, thighhighs, umamusume, window