You Are Teaching Me to Be the Protagonist

Xu's ancestral family lost love and was filled with grief and anger. He jumped into a river and committed suicide in anger. Unexpectedly, he traveled through time and had a system. "Hey, Shuangwen's protagonist development system? What the hell is this?" Xu Ziwei murmured. (Yes, I wrote this book just to complain about cool writing routines. This poison was deliberately added, don't be afraid, it will become more exciting after you taste it too much (｡•????•｡｀)