After I Transmigrated into a Book as the Real Heiress, I Beat Everyone Up

[Transmigration into a Book / Fake and Real Daughters / Face-Slapping / No-Brain Power Fantasy]

Su Su, a boxer, transmigrates into a novel as Su Su, the ill-fated real daughter who was switched at birth and happens to share her name.

Her biological older brother bullies her, people around her torment her without restraint, her adoptive parents abuse her, her biological parents favor her to an absurd degree, and her so-called childhood sweetheart and fiancé looks down on her when he returns.

All of it seems to tell Su Su one thing: she exists to be a cannon-fodder character, making way for Huo Xintian, the heroine.

What a joke. Why bother?

She might as well stretch out her legs, close her eyes, lie flat, and play dead.

But the suicidal fake heiress, her biased parents and brother, and her fiancé with eyes full of crap keep coming to pick fights with her.

Damn it!

What the hell do you want?

One comes, she beats one. Two come, she beats both.