I have a sister.
She and I grew up playing together.
Later I died.
After death, I became Piao. Not only did I discover that the world I lived in was a book, but I also discovered that my sister was the villain in the book.
Me: ... This world must not be very scientific. How could my sister be a villain?
She is the best sister to me in this life.
Purpose: Ordinary people should not become stepping stones on the protagonist's path.
