MC transmigrated into a book (I believe), but as the cannon fodder ex-husband of the ML. HE has no presence and no one remembers him until after he signs the divorce papers of the ML. The ML is in the entertainment industry (I believe). The MC is actually really good looking and once he regains his presence everyone wonders why they couldn't remember him before. MC becomes an actor and the ML starts to chase after him again, including at one point posting the original marriage certificate.