Her husband has passed away, and Haruka, now 60, lives alone with her son, Wataru, who continues to lead a lazy life as a ronin. One day, while cleaning her son's messy room, she finds an incestuous pornographic book. Haruka is angry that he hasn't even studied... but she becomes excited when she opens the book and begins to read it seriously. Her crotch becomes wet as she is consumed by naughty fantasies. After a long time without sex, Haruka...