Ayumi lost her husband early and raised her only son, Koji, by herself. He lived a modest and happy life, but there is something strange about Koji, who has reached puberty. While I was wondering what to do, I noticed a dream sperm on my underwear. Ayumi, who decided to teach the correct knowledge of sex for her beloved son, began to learn how to have sex using herself as a teaching material. However, at some point, my son's high-speed piston began to show an ecstatic expression.
