The true daughter's voice is too crazy, (COMPLETED)

Luo Xixi wore a book, and even transformed into a vicious cannon fodder real daughter who is crazy and always bites the heroine.
The system told her that her mission was to change the mentally retarded plot and lead a family of cannon fodder villains out of the death ending. Otherwise, they would be betrayed and separated from each other, and would be killed by the combined efforts of the male protagonist and the second male protagonist.
But if you want to change the ending, you have to go against the heroine. Look at the heroine whose halo shines on the earth, and look at her heartthrob system with the best performance. Luo Xixi shouted: The task is too difficult, I can't handle it. Arrived.
Luo Xixi, who recognized the gap in strength between the enemy and ourselves, decisively made a decisive move and handed the stage to the heroine.
However -
her parents who hate her said: "Xixi, mom and dad love you, take the black card and spend it as you like!"
The eldest brother who according to the plot should send her to a mental hospital: "Xixi, no one can send you away, you will never She is my sister. Whatever you want, the elder brother will buy it for you."