This is the story of a group of boys trying to save the world! As children, Kenji and his friends created many stories about an evil organization aiming to destroy the world. As adults, someone is now turning their fantasies into reality! Humanity, which faced its 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 impending disaster begins to unfold, this symbol returns.

This is the story of a group of boys trying to save the world. In the middle of Tokyo Bay, a man named Shogun is trying to escape from Umihotaru Prison, a maximum-security island fortress, so he can save the world. Accompanied by a terrified young manga artist, these two men are ready to risk everything as their daring escape plan becomes increasingly dangerous over time.

However, the prison authorities will do whatever it takes to return Shogun and his reluctant companion back to prison. Shogun's ultimate goal: Tokyo, where a girl he calls the last hope lives, but a murder in Kabukicho has triggered a chain of terror. Can Shogun uncover the truth about the false peace created by the Group? And what are the truths behind the destruction that occurred in the final moments of the 20th century?