This novel was called "Sky-high Price Gossip: Forcibly Married a Billionaire Fiancée". The female protagonist was Gu Qiqi, and the male protagonist was Nangong Yaoling. The female lead entering Xia Xiaonuan's body was a plot from another novel,"After the Soul Exchange, I Lost My Horse." However, both novels are very interesting. I can read them together. I recommend them to you. I hope you like my recommendations. Muah ~