Looking for a Book! The First Person to Find One Gets a Red Envelope!!! 找书，找书，第一个找到的给红包！！！

It's a typical quick transmigration novel. The heroine collects fragments of the male lead, and her nickname is Huahua. One world is set in the apocalypse, where she uses vines to play with the male lead. At the end of the book, the author also wrote a story from the perspective of a reader who travels to the male and female leads' world. That's all I can remember.