chikabe, biwa hayahide (umamusume), umamusume, commentary, highres, 1girl, ahoge, animal ears, artist name, bow, bowtie, breasts, cowboy shot, glasses, greyscale, hair ornament, hand in own hair, horse ears, horse girl, large breasts, lips, long hair, looking at viewer, monochrome, open mouth, pleated skirt, puffy short sleeves, puffy sleeves, sailor collar, school uniform, semi-rimless eyewear, serafuku, short sleeves, simple background, skirt, solo, summer uniform, tracen school uniform, under-rim eyewear, wavy hair, white background