[Feel-good power fantasy + System + adored by all + face-slapping and punishing scum + 1v1 historical romance]
Wei Qin transmigrated into a book.
She became a foolish cannon-fodder character who drowned in her family's lotus pond. In the story, her two older brothers died one after another, her mother wasted away in grief, and her maternal family gave their lives for their country. Not one of them survived.
The whole family, wiped out together.
Luckily, Wei Qin got bound to the Cannon-Fodder Rescue System, unlocking her golden finger and vowing to change their tragic fate.
First, there was her dear mother, all lovey-dovey with her scumbag father and clearly head over heels for him.
[Mom, do you know that the father who seems so perfectly in tune with you only sees you as a stand-in? And the adopted daughter in our household, who gets treated as my equal, is actually the illegitimate child of that dog of a father and his beloved first love!]
Then there was her eldest brother, upright and so righteous it was almost absurd.
[Big Brother, you studied hard for twenty years just to come top of the imperial examinations. But after placing first in all three rounds, you were framed in a cheating scandal. They stripped you of your honors and threw you in prison, where you died without a body to bury.]
And her second brother was even more worrying.
[Second Brother has the worst fate! Simple-minded and brawny, he has no chance in the civil examinations, so he can only learn martial arts and join the army, all for the glory of our country. But on the battlefield, he accidentally overhears that dog of a father plotting treason with someone, and his own father has him killed to cover it up.]
That was unacceptable! First, get her mother to divorce the scumbag, then kick out that freeloader who had leeched off her mother's family! What? There are also two “sisters” practically dripping with fake sweetness? Give them both a couple of slaps first.
In the end, her mother finds new love, her eldest brother rises to high office, and her second brother commands troops on the battlefield.
Wait.
Isn't that the original story's villain, the one who turns evil? He's pretty handsome! Better take advantage of him while he hasn't gone dark yet!