1girl, animal_ears, bare_shoulders, blue_hair, braid, breasts, choker, cleavage, crown_braid, ear_ornament, horse_ears, horse_girl, large_breasts, long_hair, looking_at_viewer, lying, mejiro_ardan_(flowers_of_prayer_dance_in_the_night_breeze)_(umamusume), mejiro_ardan_(umamusume), noa0319, official_alternate_costume, on_back, purple_eyes, simple_background, smile, solo, umamusume, white_background