Owari no Chronicle

Existence's future rests on a forgotten conflict and a hesitant hero's improbable quest. Decades prior, humankind triumphed in a ruinous war against nine other dimensions, an event termed the Concept War. This critical, concealed occurrence has vanished from public recollection. However, a new danger now approaches. The rapid increase of "Minus Concepts" propels the world toward inescapable ruin, necessitating a fragile coalition to prevent disaster. Mikoto Sayama, an average high schooler, finds his life irrevocably altered by his grandfather's demise. He is unexpectedly called by the vast corporation IAI, an enigmatic entity intrinsically tied to the world's concealed past. Within IAI, Mikoto uncovers a reality far more profound than he imagined, revealing his pivotal role.