Eriko has a past of aiming to be a researcher at a national literature department because of her hobby of appreciating literature.She is now married and takes care of her only son as a stay-at-home mom.Even after her marriage, Eriko found her spare time and devoted herself to reading literature, but she became lustful while reading aesthetic works.Now that her husband is not on a single assignment, there is no husband and wife's work and her Eriko's body is completely frustrated.At that time, she felt sexually aroused by the masculine body of her son's friend who came to visit her.