1girl, animal_ears, black_dress, blush, breasts, brick_wall, brown_eyes, cleavage, dress, horse_ears, horse_girl, horse_tail, long_sleeves, looking_at_viewer, medium_hair, nice_nature_(umamusume), night, open_mouth, red_hair, see-through, sitting, smile, solo, table, tail, tyabesu, umamusume, window