I Transmigrate into a Book Set in 1975, and the Fake Heiress Goes Wild in the Countryside

[Transmigrate into a Book] [Fake Heiress] [Pocket Dimension] [Cannon Fodder Awakens] [Ready to Throw Hands at the Drop of a Hat]

One moment, Su Manman transmigrates into a book, and the next she's become a miserable little cannon-fodder character who hands the heroine opportunities, golden fingers, and good karma.

A drastic change in her life, and an even bigger change in her personality. That's understandable, right?

Going berserk at the slightest disagreement? Nothing wrong with that, right?

But why is it that the relatives who barely got a mention in the book have secrets of their own?

Can "Fighting Mad Manman," up against a heroine who schemes at every turn and is blessed with a protagonist's aura, come out on top?