I’m Going to Become the Villainous Duke’s Family

I was reincarnated into a book. And not just that— I was given a terminal life, suffering from the same rare disease as the female lead. The female lead is cured because the villain gets the medicine for her, but… I die before the original story even begins! Rowina decides to snap the villain—who is still living like a shell of a man, unable to pull himself together—back to his senses, and to bring forward the timing of when he’ll obtain the cure. “Hello, Duke. I’m from the Townsend Orphanage. My name is Lowena Whitfield, and I’m ten years old.” “…What?” “If you take me in as your family, I’ll run out to greet you at the front door every time you come home.” “What is this—” “And also, this is something I really worked up the courage to say.” “What now?” “I’ll even give you a goodnight kiss before you go to sleep.” I decided to become part of the villain’s family.