After Passing Through the Book, I Exchanged Souls with the Villain Tyrant

After an accidental death during overtime, Xu Guan found himself transformed into the cannon fodder female supporting character in a novel. In order to survive in this world and not die early like her original owner, she accepted the fate of marrying the tyrant. After entering the palace, all she wanted to do was hug the heroine's thigh tightly so that she could live longer. Unexpectedly, once she fell into the water, she actually exchanged souls with the villain tyrant. Now, not only does she have to worry about her own life, but she also has to be on guard against the tyrant seeking death at all times. So, when the tyrant scolded her, she comforted him, and when the tyrant caused trouble, she dealt with the aftermath... Xu Gu'an expressed that she felt very tired... Wait, why is this tyrant looking at me more and more wrong! This is different from what is written in the book...