The whole book of War Spirit I is divided into a prequel and the first season. The prequel mainly tells the story of alien creatures invading the earth, and then accidentally gaining superpowers and vowing to defend the earth to the death, but in the end they did not succeed. The first season tells the story of mankind's future rebirth as an alien, and the protagonist opens a new chapter!
Concept: Why does evil exist just to bring out the beauty of the world?