1girl, animal_ears, black_hair, blue_eyes, bob_cut, breasts, cleavage, collarbone, confetti, detached_sleeves, eishin_flash_(umamusume), grass, hair_between_eyes, hair_ornament, hand_on_own_chest, heavy_breathing, horse_ears, horse_girl, horse_tail, medium_breasts, on_one_knee, outdoors, short_hair, solo, swept_bangs, tail, thighhighs, umamusume