Washio Sumi wa Yuusha de Aru

In the year 298 of the Divine Era, humanity clings to survival in Shikoku, the last remaining habitable region on Earth. This solitary sanctuary is shielded by Shinju-sama, a sacred god tree that stands as the final barrier against total annihilation. When an enigmatic and relentless enemy known as the Vertex begins its assault on this divine protector, three elementary school girls—Sumi Washio, Sonoko Nogi, and Gin Minowa—are chosen for a monumental task. Entrusted with the fate of their world, they must rise as heroes to defend the god tree and preserve the only home mankind has left. Bound by duty and armed with newfound purpose, the young trio steps onto the battlefield to confront a threat far beyond their years. Yet, beneath the noble calling of heroism lies a harrowing reality they cannot yet comprehend. The war against the Vertex demands sacrifices that extend far beyond physical courage, threatening to exact a devastating toll on their lives. Unaware of the true price of their mission, Sumi, Sonoko, and Gin are about to discover that protecting their fragile world will cost them more than they could have ever imagined.