Unho had a child and got married at a young age, but gradually became sexless. When her son was in college, she found out about her husband's infidelity. While living separately from her husband with the intention of divorce, her son came home for summer vacation. To report the divorce, she went on a hot spring trip with her son, who confessed that he liked her as a mother. More touched by her son's kindness than her husband's coldness, she felt both maternal guilt and feminine pleasure. In a small inn deep in the mountains, the mother and son lost themselves in each other... A tale of incest!
