A blazing meteor streaked past Earth, bringing with it several monsters that plunged the Earth. The military's ammunition was not effective against them. Then suddenly, a window appeared before everyone. The Earth has entered beta testing and will survive until the main game begins. Grey, a renowned archaeologist, begins his domination after awakening the ultimate class.

Joel, the young master of a once prestigious clan, was met with a brutal reality, as all his clan members suddenly disappeared. He even fails to awaken an affinity, or so everyone thought, until he awakens the affinity that was not meant to be. See his journey as he defies all to look for his family.