Hundreds of years ago, in a Ginga universe there, existed a Legendary Planet, Earth. The planet lost its natural luster and perished as human raced for a cultural enlightenment. Unprecedented catastrophe…. This killed millions of humans as it turned people’s lives into misery. Toward the Chaotic Earth, Humans have lost anyway to deal with it and made a grand breaking preparation to move out of the planet. After countless searching, the human race’s space technology finally found a planet with astonishingly familar environment with Earth…and they named it the Second Earth