Cinderella Husband

An Yeran has crossed over into a novel as the cannon fodder second elder sister, featuring the city's Lofty Dragon. Her younger brother, however, is the novel's male lead, Lu Xiu, who goes from Cinderella to Lofty Dragon.
Lu Xiu suffered bullying from his stepmother and two elder sisters since childhood. Once grown-up, he took revenge on his stepmother's family to the point the stepmother was forced to jump off a building, the elder sister was sold to the Mafia, and An Yeran was sent to the Mental Hospital where she died.
An Yeran exclaimed, "What does the future plot have to do with me?!"
The System S12 accidentally pulled an extra person during the teleportation process, this person was An Yeran.
Thus, S12 informed her that the time-space tunnel would reopen when she turned 18. If she jumps off a tall building by the age of 18, she can return to her original world.
Hence, 8-year-old An Yeran didn't follow the plot and freely defied conventions, reveling wild and free, as long as she jumps off a building at 18, she's good!
Unexpectedly,
The Cinderella male lead would actually scream her name in a desperate and mournful voice the moment she jumped off the building.
"I won't take revenge! Come back! Come back!"
Days back in her world were calm until one day she was abruptly dragged back into the novel world by the urgently rushed System S12.
Faced with her younger brother who'd deteriorated beyond recognition, An Yeran wanted to cry but had no tears.
— Heaven wants to destroy me!
The male lead pretends to be innocent in the early stages, the female lead is rather overprotective.
Late stage reveals the male lead's sickly affectionate nature, with slight coercion into isolation.
PS: 1v1 Revenge rebirth of a black lotus sickly affectionate male lead (Lu Xiu) with high combat ability, and a tomboyish female lead (An Yeran) who accidentally traveled into a novel.