On the Wedding Day, the Substitute Princess Invited Herself Down the Hall

Si Xianyu, the genius doctor of the last days, brought the dead back to life with his bare hands, and was skilled in both healing and poisoning. Once he died, he found that he was transported back to the days when he was a cannon fodder female supporting character in a book in his previous life. The father doesn't care for the mother, and the little white flower who took her identity cried, made trouble, and hung herself three times. Si Xianyu had a headache for three seconds, then he picked up the dick and did it! Want to mess with me? I'll send you to the West first! Want to plot against me? Count how many bones in your body are enough for me to knock! The medical system is at hand to treat all kinds of complaints! The little tyrant who had originally agreed on a revolutionary friendship and colluded with him, but he clung to her shamelessly and said, "Madam, I have worshiped heaven and earth, and I will not return it!"