In a single-mother family, my son was glancing at his mother's ass. I was always observing the underwear that my mother, Ichihana could wear, but I was frustrated by my mother's sober underwear that didn't look good. As the son saw the various colors of underwear that had been dried outside, he had a wicked feeling that he wanted to see where his mother wore flashy underwear. And I steal sober underwear one after another in a place that my mother does not see, and bring it to a state where I have no choice but to wear flashy underwear.