Inside a novel as the Hero's useless brother

How to turn the most insignificant character in the story, described in just a couple of lines in the book, into the most interesting one? It's extremely simple! Make him a nobody! His older brother is the protagonist of the novel. As it is to be expected, an OP with a harem... His twin sister is a powerful reincarnator, collecting all the cheat items around the world... Even his wife is not only an incredible beauty, but also a hidden goddess... What about the character himself? Well...the author of this novel seems to have forgotten about him! Talent? Superpowers? Attractive appearance... or maybe at least wealth? None of that! " Of all the possible cannon fodder, why did I move into this exact body? How am I supposed to survive?" Follow Arthur Hayes on his arduous journey through the world of the novel, that he has read, as the useless brother of the main hero.