In the vast universe, in addition to the human civilization on the earth, there are many more advanced civilizations. When the Zerg invaded the galaxy and attempted to occupy the earth's resources, Arturos, the protector of the solar system, led the mecha warriors to repel the invaders. However, Arturos was also seriously injured in the battle. He wanted to elect a new protector of the solar system. At this time, the rapidly rising human civilization attracted his attention...
