Unbreakable 

The laws of the world have changed! In an instant, the world turned into a hell for the strong because of the god Kashita. At the end of the slaughter test given by the gods, Yu Do-Hyeok became the “Great Emperor”, the strongest of mankind, and defeated God. However, the pleasure of victory is short-lived, and everyone returns to the first day of the trial with their memories of what happened. With the exception of Yu Do-Hyeok. Instead of helping each other, people rush to take the place of the strongest one by killing the Great Emperor. In a world crazier than his previous life, can Yu Do-Hyeok kill God and restore peace?