RahXephon

In the early 21st century, Tokyo, the capital of Japan, was isolated from the outside world by a semicircular barrier erected by external invaders known as Mu (pronounced "moo"). Those outside the barrier call it "Tokyo Jupiter" due to its resemblance to the planet, while those inside believe that "the world outside Tokyo has perished." Years later, the protagonist Ayato Kamina, residing in Tokyo, encounters a train accident on his way to a mock exam. While seeking help, he meets a mysterious girl named Reika Mishima and, guided by her, arrives at an underground temple. Suddenly, a mysterious "object" that "sings" appears above Tokyo, resonating with Ayato and causing him to collapse in the temple. Amidst his confused consciousness, Ayato utters the word "RahXephon." Then, the "giant" within the temple awakens...