Mission time: years ago (human civilization calendar: 2030 AD) Mission location: the birthplace of human civilization, the home planet of the human empire - Earth Mission goal: destroy human civilization before it enters the interstellar age. "Human civilization in 2030, They should still be using backward fossil fuels and using nuclear fission reactions to boil water, right?" Lin Yi thought. Until he saw the will-o'-the-wisp boy with yellow hair flying over his head on a flying sword...