My Sister Was Executed, I Chose the End of the World

It's not the protagonist who destroys the world, it's the demon who has already planned it. What I want to see is the protagonist causing the end of the world. You want to add a demon to whitewash the protagonist in the later stage!

This is rubbish, don't read it anymore. It talks about the end of the world and insists on saving your sister, but it still doesn't save her. It just kills the monsters first and runs away from the plot. And it is known to everyone that it must be done. It is also a lot of nonsense, blocking the senior official, a lot of nonsense, not killing, listening to a lot of nonsense, and then pretending not to kill comes back and says I will kill you. Blacklight Virus, right? Anyone who has played it will understand it. Those who have never played it should not read it. It just sucks. I just want to criticize you and say that your writing is bad.

Why does Mao have to kill the protagonist's sister? Didn't you give a reason?