I Asked You to Wear a Book and Become a Puppet Prince, How Come You Became the Protagonist?

Shen Chengzhang, a naval weapons designer, died suddenly in a gym, and when he opened his eyes, he was transformed into the cannon fodder second prince with the same name in a female channel conspiracy novel. A good-for-nothing prince who was treated as a puppet by the villainous Marquis of Xiangnan and made a joke by the civil and military officials of the entire court. The beginning was a dead end: on his wedding night, the villain broke into his wedding room, seduced him and wanted to sleep with his princess; the guards in the palace were all the villain's lackeys; everyone in the capital knew that he was a piece of shit who couldn't hold up the wall. I am a royal prince! How can my sister endure this humiliation when she still holds a hundred thousand troops from Jiangbei? You won't rebel, let me rebel! Travel once. Am I still so angry with you? I stabbed the Marquis of Xiangnan to death with a backhand sword. You, the Marquis of Xiangnan, will not rebel against me! Look how I can make great achievements! Step by step to ascend to the throne!