El lugar que nos prometimos

In a world where Japan is divided after a mysterious event, two young friends, Hiroki and Sayuri, dream of reaching a towering structure visible across the Tsugaru Strait. They build a small plane, vowing to fly to the tower together, but Sayuri disappears. Years later, Hiroki discovers a connection between Sayuri's disappearance, the tower, and a looming threat to the world, forcing him to confront his past and the promise they made.