God-Killing Prodigal Son

Bai Yuanqing and the system encountered a time-travel accident, and they wandered into another world together, struggling to survive. The superior system became the younger brother from then on. Give it a try and make a comeback in this turbulent world! Let's fight hard to fight for the equality of all living beings for the people I care about! For the sake of love, righteousness, and common people, I will sacrifice my life to kill the gods!