From the introduction:
It’s the year 2011, and the future is on everyone’s mind. There are those in many parts of the world who fear the end, and there are others who have a bright hope for what’s to come. This is reflected in the threats that will meet the world here, and the heroes who will counter it. The Zodiarts, kaijin born from antisocial and hateful emotions in the form of Zodiart Switches, will rise from the frustrations of the youth and the machinations of ambitious elders...and the Phantoms-demons with great magical power-will rise from despair and death to claim the world. Stay strong, Jumper, for these threats are not invincible. Through courage and the bonds you make, even space and time will shatter for you! You will begin in the city around Amanogawa High School.