Apocalypse: The Fake Great Hero

Recommend Me Some Interstellar Novels!!!

I want to read something similar to After I Started Writing, the Interstellar General Became a Bookworm. Ancient settings are fine too, and stories with or without a couple are both acceptable. There are far too few books with this premise. By "fiction within fiction," I mean stories where the protagonist writes novels, or stories featuring a literary plagiarist, and so on.

The Female Lead Transmigrates, Is Smarter Than the Male Lead, and Is Strong

Looking for Books!!!!

I remember a story where the male and female leads were married from the beginning, but the marriage was in name only. The female lead had a boyfriend outside the marriage, who turned out to be a jerk. Then, by chance, she moved into the male lead's place. They gradually got to know each other and fell in love.