AHEAD Series: Owari no Chronicle (1) I

is part 1 of the first volume of the Owari no Chronicle light novel series, written by Minoru Kawakami and Illustrated by Satoyasu (TENKY). It was released under the Dengeki Bunko Imprint in June 2003.

Synopsis
Once upon a time, the world was fighting against 10 different worlds that existed in parallel. It has been 60 years since we won the war called the Conceptual War. Now that everything is hidden and time has passed without being known to the general public ... High school student Sayama Mitsuto is suddenly called by the giant IAI after the death of his grandfather. And that this world is moving in the direction of destruction due to the acceleration of negative concepts. To prevent it, we must negotiate with the survivors of each different world and release their 10 concepts. Thus, Sayama is involved in the final battle as a post-war process of the conceptual war that left a lot of regrets. The new series released by Minoru Kawakami has finally started.

(source: Amazon JP - Translated)