The book "Marry a Silly Concubine" met the requirements. The female protagonist had transmigrated to a girl who was called a fool. Her parents wanted the female protagonist to marry her sister. The female protagonist did not care about what others thought. She only cared about her own brother. In the end, she decided to put on a wedding dress for him, but this time, she would not marry him. I hope you like this fairy's recommendation. Muah ~😗