The Perks of Being an S-Class Heroine (also known as A Transmigrator's Privilege) - Book 1 Complete
311 chapters plus 29 side stories and whole book is 2540 pages (Book Complete)
The story follows a young woman who dies prematurely in a car accident. Right before her soul is transferred, she manages to sign up for a literal "Transmigration Insurance Package". This accidental stroke of genius gives her access to a high-tier support system, a community of gods, and an in-game item shop.
However, her luck takes a turn when she realizes she has been transmigrated into Infinite Returns to Save the World—a notoriously brutal, rage-inducing, high-fatality action novel destined for destruction. Reborn as Ailette Rodeline, an adorable child prodigy, she must use her "cheat" insurance system to survive the harsh world and keep the novel's original protagonist alive.