It's surprisingly little known that women often squat slightly backward when using the toilet. This posture causes feces to twist out in a shape resembling a hill—known as "hill poop" (oka-guso). The term refers to the situation where, despite efforts to keep feces from touching the water, it inevitably sticks to the rim of the toilet bowl, forming a mound-like shape similar to a small hill. This work has gained attention as a representative example of hidden camera toilet voyeurism, realistically capturing women's embarrassing toilet moments.