Is there a novel where the main character changes between a man and a woman?

There were many novels where the main characters changed between men and women. This kind of plot often appeared in science fiction, fantasy, or martial arts novels. This kind of plot could increase the variety and appeal of the novel, allowing the readers to better understand and feel the characters and emotions in the story. For example, some novels had male protagonists who became female in the later part or climax of the story, and some novels had male protagonists at the beginning but became female as time passed. This kind of plot could make the novel more suspenseful and surprise to attract the reader's interest.