World United: Sci-Tech Era

In any place, planets in any universe and other worlds, if a threat comes from the outside, everyone will definitely unite to defend their land. And a planet called Earth, it's not exempted. Either luck or fate, human beings was able to discover something strange,,, an alien. The visit was secretive and unfriendly for the two parties to fight for their own believes. Fortunately, the human side was able to kill the lone intruder but loss many lives. With this encounter, the human race took it as a heads-up and made a lot of worldwide preparations; focusing in military and directly eliminate many civil matters. At that time, the main character was about to settle down, have a family on his own and enjoy the rest of his life but didn't expect for such a big thing to happen. Lucky he was, had an adventure for him to have the ability to protect his beloved and all the people around him. But one man can't cover the whole planet for many people to die and two-thirds of the land to be occupied by beasts sent by the invading enemy. Although humans had lost in the first war, they learn a lot of things for the rapid growth and develoment in different areas, especially in the field of Science and Technology. When the right time comes, it will be humans who will be on the offensive. For sure there's still a big gap to win against an enemy who got the lead, but human beings is a race that will never give up; will never let anyone get what theirs. But at the end, things sometimes won't go as planned to lose something,,, someone...