sakurazaki kosuzu, dokkoida, artist request, source request, 1girl, ass, bathroom, black socks, blush, brown skirt, clothes lift, female focus, from behind, full body, indoors, looking at viewer, looking back, open mouth, peeing, red eyes, red hair, shoes, short hair, short sleeves, skirt, skirt lift, socks, solo, squat toilet, squatting, surprised, suspender skirt, suspenders, sweat, toilet, toilet paper, toilet use, uwabaki, white hair, white shoes