I Need to Raise My Sister Right

After a car accident, I woke up as the half-sister of the main villain in the novel. Having already possessed her, I decided to lay a flower path to prevent the villain blackening. I worked hard with all my heart and strength… Somehow, I worked and worked stably with the Grand Duke of Lyserville, who was known for his bloodless mu*der. “Didn’t you warn me, that you wouldn’t let me go?” After seeing me with another man and chasing me after an affair, “Do you like me?” I asked. “Don’t be ridiculous.” I wondered why this man was so interested with my private life.