In the world, there are some evil creatures known as "chousha" (the kanji read "Chou" = "Omen" and "Sha" = "person") that can only be killed by Cremators, people who use fire to incinerate them....

You lead quite a nice life... Competing with your friends... Having a childhood-almost-girlfriend, who is coming back to town... All dreams starting to come true... when the ground suddenly shakes and a shel...