The Last Guardian of Earth

3,000 Years in the future, the nuclear war "Box War" will cause the earth to become a radioactive wasteland, and human and animal genes will mutate. The surviving humans are divided: Earth's superpowers establish the Guardian Alliance; Moon immigrants develop high-tech civilization; Mars exiles evolve into a physically powerful empire of modified humans. The three major forces have been facing each other for thousands of years, and war is about to break out.