Love Evolution Agent

I have a sister who is cute, pretty, well-behaved, and good in everything, but she is not good to my brother. She has been bullied by her younger sister since she was a child, and was even driven to live with her grandfather, unable to even return home. In school, I was also ostracized by my younger sister. The dream has haunted me for more than ten years and I still can't figure it out. Why does Xiaonan hate me? What is she hiding? The remaining memories of a little girl from her childhood reveal a mysterious organization that has been searching for many years... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.