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A pitiful mother, Ryoko, who can't resist the violence of her unruly son and obeys as she is swept away. If his son didn't like the change of clothes, his mood would quickly deteriorate, and his anger would be directed at Ryoko's body. He would write extremely vulgar graffiti one after another on his mother's exposed buttocks. It was Ryoko who desperately tried to wash it off so that her husband would not see it, but her son's surveillance eyes were always shining in the house. The fate of a pitiful mother who spends all her time under the supervision of her son...