Chainsaw Demon

I can't find the starting point for co-authoring the Chainsaw Man fanfic.

I have to complain, this book is already too old. There are indeed very few fan novels about Chainsaw Man, and the author does not continue to write. How can many people read this book that just came out? Even if someone does read it, they will only save it and wait until there are a few more chapters in the book to read it. But the author does not update it, so I am just reading it.