Zombie Queen transmigration into a book

What unfolds when a bored and hungry zombie woman, who turns to reading to meet her basic needs, finds herself transmigrating into a dungeon apocalypse novel—the very book that led to her accidental death?

If she had been mere cannon fodder, it might have been simpler. Instead, she was the unremarked passerby who perished after handing the female lead a special ring—a grand golden finger that ultimately ended the apocalypse.

And she wasn’t even acknowledged by the female lead, who claimed all the credit for saving the world, conveniently forgetting her sacrifice.

After grasping the situation and losing the ring, her primary concern was finding food and a place to rest.

She has no interest in being the world’s hero; she is kind enough to let the female lead bask in all the glory.

But the two men she saved at random keep hanging around, unwilling to leave her alone, while a reborn female lead glares at her with hatred.