I Interacted with the Mysterious Queen of the Lord of Mysteries

A Mysterious Fanfiction: The protagonist, Chen Yuan, a "broker," has been traveling through the Harry Potter world for seven years. He finally receives an offer to become a professor of Muggle Studies at Hogwarts, but upon waking, he finds himself transported to another world—this time, in the body of a woman. At the same time, the "Mysterious Queen" Bernadette awakens within Chen Yuan's body. PS: The male and female leads swap souls every few days. (The author has already completed the novel "A Mysterious Journey Begins with Harry Potter.")