Doomsday simulator, I prove extraordinary with swordsmanship

First person:
My name is Zhao Cheng, I am 16 years old, I live near Qingyuan Middle School in Shonan City, and I have no date. I was studying in Qingyuan High School, and I had to study until 9pm every day before I could go home. I don't smoke, I don't drink alcohol, I go to bed at 11:30 in the evening, and I have to sleep for seven hours a day. Before going to bed, I must drink a glass of warm milk, and then practice breathing for 20 minutes, never leaving any fatigue until the next day.
third person:
When darkness falls, who exploded himself and collected sparks? !
In the end of the catastrophe, who smashed the enemy and saved the world? !
It's him! It's him! Still him!
This is an era that is a thousand times more desperate than the most bloody years in ancient times, and all souls perish.
Everything is coming to an end, one world after another, dying irretrievably.
Until, the savior came with a fire...