Since divorcing her husband, Ryoko has lived alone with her son. However, at one point, Ryoko realizes that she has been doting on her son more than her husband. The moment she thought, "I don't need to worry about that man anymore," Ryoko and her son fell into a forbidden relationship. The two people who have spent the most time together in their lives intensely desire each other, and without anyone to get in their way, they develop a passionate love that they devour...