Worried about her son's future, who doesn't have a girlfriend and just reads porn, Ami sees her son's penis for the first time in several years, and sees that it has grown into an unbelievably huge cock. The more Ami looks at it, the more she is Kokoro by its impressive size. "If this keeps up, it'll be a waste! Who's going to be the first to have this huge cock..." Feeling sorry for her son's huge cock, the mother decides to take his virginity in the name of sex education...