After an unusual dark-red tsunami struck Alpha, one of the three great nations, the entire continent descended into panic. Not because of the tsunami, but because a highly dangerous creature called a “Parasite” suddenly emerged from it.
Through an act known as “parasitism,” they invade other creatures and turn them into hostile beings called Parasites. These creatures soon swept across the whole continent of Isos, reducing its population by nearly half in a short time.
Of course, humanity would not simply let them do as they pleased. The banner of resistance was raised.
But... it seemed there was more to it than that...
