A strange god-like System takes over Earth and all of its inhabitants, wildly changing the world and setting in motion a path for people and newly mutated Mana Beasts to grow unbelievably strong by battling enemies and taking advantage of rare opportunities. Only, the System doesn't intend for beings to gain strength for the sake of it alone, that would be far too easy. Instead, after one month of its time on Earth, chosen inhabitants, picked for their strength, will be sent to be pitted against the beings under another, different System in charge of other worlds. The winner gets rewarded. The loser...has their planet mined and stripped for resources.

Enter our intrepid main character, a lost young man lacking purpose...until the System arrives and shoves that purpose down his throat, spurring him to grow to heights unimagined, all to defend his world.

Let the cosmic battle begin...