Naoki Urasawa'S 20Th Century Boys, Vol. 4

This is the story of a group of boys who try to save the world! As boys, Kenji and his friends came up with a bunch of stories about an evil organization bent on world destruction. As adults, someone is now turning their fantasies into reality!
Humanity, having faced extinction at the end of the 20th century, would not have entered the new millennium if it weren't for them. In 1969, during their youth, they created a symbol. In 1997, as the coming disaster slowly starts to unfold, that symbol returns. This is the story of a group of boys who try to save the world.
Kenji wrote "The Book of Prophecy" in his boyhood. Now this childish fantasy has become the scenario for the Friend's fiendish plot to destroy mankind. Kenji goes underground and waits for a chance to fight back.
Meanwhile, the evil organization is closing in on a man called Shogun in the ganglands of Bangkok. The mystery grows deeper, the fear more intense, as we near the final battle at the turn of the century... Is there really any way to save the world from annihilation?