akagi koku, copano rickey (umamusume), umamusume, commentary, highres, 1girl, :d, ahoge, animal ears, arms up, bow, bowtie, double bun, full body, greyscale, hair bun, horse ears, horse girl, horse tail, long hair, looking at viewer, monochrome, multicolored hair, open mouth, pleated skirt, sailor collar, school uniform, serafuku, shoes, short sleeves, simple background, skirt, smile, solo, standing, summer uniform, tail, thighhighs, tracen school uniform, two-tone hair, zettai ryouiki