It was a modern novel with one woman and four men. The men's surnames were Mu and Xu respectively. The two surnames were Ou and they were brothers. The female protagonist's surname was Mu.
This is an interesting plot of the novel. Here are some of my explanations for the plot: - Mu and Xu were brothers with the surname Ou. This setting made it easier for the readers to remember the characters 'names and also added some complexity to the story. - The female protagonist's surname is Mu. This may confuse the readers because Mu and Xu are the same surname while Ou is another surname. In order to solve this problem, the author might explain in the story that the female protagonist's father or grandfather had a special surname, so she had to use two different surnames. - The novel might describe the complex emotional relationship between the two brothers, such as competition, kinship, love, etc. These elements would enrich the plot and character of the story, allowing the readers to better understand and feel the story. I hope these explanations will be helpful. If you have any other questions or need more explanations, please feel free to let me know.