3girls, air_groove_(quercus_civilis)_(umamusume), air_groove_(umamusume), animal_ears, black_hair, blush, breasts, brown_hair, christmas_tree_costume, cleavage, closed_eyes, horse_ears, horse_girl, looking_at_viewer, multiple_girls, narita_brian_(hungry_wolves)_(umamusume), narita_brian_(umamusume), official_alternate_costume, pun, see-through, see-through_cleavage, simple_background, surprised, symboli_rudolf_(christmas_emperor_tree)_(umamusume), symboli_rudolf_(umamusume), takiki, umamusume, you're_doing_it_wrong