Ayato Kamina may seem like an average boy in a devastated world, but after being captured by TERRA, a military organization set on saving the world from the Mu, an alien race set on "tuning" the world, he realizes he is an instrument in deciding the fate of humanity and piloting RahXephon. Not only is Ayato the only person who can control the mecha, but he also has a terrible fate of his own. Holding onto memories of his old life and grasping to keep his own humanity, he must struggle in this new world and realize his true potential with RahXephon.
Akiyuki lives on post-war Sentan Island, always rushing between the demands of his separated parents and his friends at school. But his carefree days come abruptly to an end when his school bus suffers an explosion, the first attack to plunge Sentan back into war. Akiyuki lives to find himself turned into a Xam'd, a mysterious creature, by the suspected cause of the explosion. Engulfed by Xam'd, Akiyuki is eventually saved by a red-haired girl, Nakiami, only to find himself torn away from those he loves. Now he must work to control and understand the creature within him, all while searching for his family and friends in a world steeped in the secrets and chaos of war.
Both anime use interesting ensembles of strong emotional relationships and dependencies. Both are sorta non-mecha mechas, but like in all good anime of any type rely on the emotional resonance of the characters and the story. There is less explanation in Bounen no Xamdou on the nature of the world, but neither goes overboard on telling the world and instead sticks mostly to showing it as it is - as the characters experience it.
Kamui has returned to Tokyo with a traumatizing past, but he is not the only one. Many people are returning to Tokyo for the same reason: they play a part in the End of the World. The Dragons of Earth and the Dragons of Heaven now must fight for the destruction or safety of the world. But is this troubled Kamui really the key to saving the world?
Like RahXephon, X TV is another series where one boy controls the destiny of the world, and must find himself and deal with his inner turmoil to make the right choice. Although there are no mecha in X, it's a truly stunning series not to be missed.