Yumi is working with her husband today at a small town factory that has been supported by two couples and several employees. Recently, my son Satoru helped me with the factory, and from around me, I seemed to be a very close parent and child. However, Yumi and Satoru had a forbidden relationship, hiding from their father and loving each other. The two are absorbed in the "immoral pleasure" that no one should know, and their obscene acts escalate in search of thrill and pleasure.
