1girl absurdres alternate_costume animal_ears bangs bare_shoulders blush bow bowtie box breasts brown_pantyhose christmas_tree closed_mouth dress earrings feet_out_of_frame gift gift_box hand_in_own_hair highres horse_ears horse_girl horse_tail jewelry long_hair looking_at_viewer lying mefuyaka mejiro_mcqueen_(umamusume) off-shoulder_dress off_shoulder on_side pantyhose pom_pom_(clothes) purple_eyes purple_hair red_dress santa_costume short_sleeves small_breasts smile solo tail umamusume