I recommend the book " Poison Pet Agent Ugly Concubine " to you. The female protagonist happened to transmigrate to another world and contracted a strange illness. However, she was a smart and decisive female agent. Through her own efforts, she exposed layers of conspiracies and became famous all over the world. The male lead was a black-bellied man. Although he looked gentle and refined, his desire to control was strong. The story revolved around the female protagonist's strange illness and conspiracy. It was very exciting and interesting. I hope you will like it.😘