X−エックス−.

It's the year of destiny and 15 year old Kamui Shirō, a powerful psychic, has returned to Toyko after a 6 year absence. He returns to protect his childhood friends, Fūma, and Fūma's younger sister, Kotori. But destiny and fate are haunting Kamui and pulling in himself and his loved ones. It is his destiny to decide the fate of the world and mankind, no matter if he wants the role or not.