If Your Sister Is Killed and the World Is Wiped Out, Then What Does My Family Mean?

In order to stay young forever, the daughter of the Chu family sacrificed blood to common people and was sentenced to death! After his death, his brother betrayed humans, colluded with demons, and opened the door to the abyss! Leading to the end of the world, monster invasion, and the entire world is in danger! Zhang Yuan was reborn three hours before the end of the game. In the last life, Zhang Yuan's parents died at the hands of monsters. He wanted to take revenge but was unable to do anything. He could only linger in the apocalypse! In this life, Zhang Yuan killed villains, seized rare treasures, changed his job to Demon Lord, and gradually grew into the patron saint of the human race! The moment the man behind the death of his parents in the current life fell at Zhang Yuan's feet. He just wanted to ask one thing: If your sister is killed and the world is wiped out, then what does my family mean?