After Passing Through the Book, He Became the Cannon Fodder Brother

[Two male protagonists, main perspective, cultivating immortals in another world, Be, fictional background (anything is reasonable)] Note: Please note that this is be. The two protagonists did not end up together. Because Ye Fanchi complained about the author of a book, he accidentally wore the book and became a villain with the same name as himself. However, he later learned from the system that he was not wearing the novel he was complaining about, but his fan fiction...