Galaxy Masters: Starting with Mercenaries

In 3558 AD, the moon was invaded and captured by the "cosmic locusts", the Schizor Zerg. After the Schizor Zerg multiplied in large numbers on the moon, they used the moon as a springboard to attack the Earth. The United Earth Government organized a global defense force to launch an "insect eradication operation." Wu Yu, a former member of the Lunar Observatory, volunteered to become a mercenary and unexpectedly received the "Savior System" assisted by a super cosmic civilization. From an unknown soldier, he gradually grew into a combat hero who has repeatedly performed extraordinary feats.