A son who rubs his mother's rich breasts every day. I thought I was still a child, but my mother, Reiko, realized that it was not. I try to refuse my son because this is too unscrupulous for a mother and child, but my son won't stop. One day, the son who attacked Reiko's bath crosses the line with his mother. A mother, Reiko, who begins to have a different feeling than ever before for her son who grew up strong. Someday my mother expected to be rubbed by her son.