My Pitiful Little Sister Finally Dropped the Act

A modern urban family revenge story. The protagonist, Gu Xingzhou, is the eldest son of the family. Since childhood, he's been treated like a tool, expected to give way to his younger sister because "big brothers should always let their little sisters have their way." His sister, Gu Nianyao, seems delicate and pitiful on the surface, but is actually scheming. In secret, she manipulates the family's emotional balance, stealing the protagonist's recommendation for a guaranteed university admission, his company shares, and even his fiancee. After an accident leads him to find an old phone his father left behind, he discovers years of chat logs and recordings showing his sister conspiring with outsiders. Only then does he realize that every "coincidence" was carefully engineered. He stops holding back and gives her a taste of her own medicine. In every trap she lays, he turns the tables, exposes her true face in front of everyone, and step by step takes back everything that belongs to him.