1girl, d, animal_ears, blue_bow, bow, collared_shirt, dated, ear_bow, floating_hair, gloves, hair_ornament, hairclip, hands_up, happy_birthday, holding, horse_ears, long_hair, looking_at_viewer, mejiro_dober_(umamusume), nitsu_(nitsuni2_2), pink_eyes, purple_hair, shirt, simple_background, sleeveless, sleeveless_shirt, smile, solo, umamusume, white_background, white_gloves, white_shirt