Sorry, I Couldn't Save Humanity

System+Interstellar+War Chiguo's research on nuclear fusion has been going on for more than thirty years, but it still cannot break through the bottleneck. Until this day, a mysterious email made the person in charge of the nuclear fusion project suddenly enlightened and successfully conquered nuclear fusion energy. However, the sender of this mysterious email turned out to be just a boy of seventeen or eighteen years old. When we met for the first time, this young man said solemnly: "Please help me pay off the rent!" He has experienced countless human destructions and returned to Blue Star again, just to save the life on this planet. If I fail to save you, please allow me to say sorry, although this apology has been repeated countless times on my lips. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.