In this chapter, we learn that Hirokazu's family is planning a concert in celebration of their elder son's 50th birthday, and that the elder son, iwamura, is a member of the clan. The elder son and his wife are in love with each other, and they are both jealous of the younger son, who is also a part of the family. The younger son is jealous of his father's affections for his wife, and he is jealous that his father is spending so much time with the younger woman. He is also jealous that the older son is spending time with his younger wife. The older son, however, is not jealous of him, and so he does not object to his father having sex with his wife.