symboli rudolf (umamusume), umamusume, umamusume: cinderella gray, highres, stitched, third-party edit, 1girl, chair, crossed legs, female focus, indoors, legs, long sleeves, miniskirt, neckerchief, pleated skirt, purple serafuku, purple skirt, purple socks, purple thighhighs, school uniform, serafuku, sexually suggestive, sitting, skirt, socks, solo, solo focus, telephone, thighhighs, thighs, tracen school uniform, white neckerchief, zettai ryouiki