Hollow In Chains

Ayato Homura leads an empty life, despite his inhuman strength. He is bored by everything. Girls. School. Fights. Everything. On his way home from school, he encounters a mysterious entity that claims Ayato can no longer "be contained by the world". Even though he doesn't understand it, Ayato sees it as a way to escape his constant boredom. The entity then sends him to another world, to "Zero Five". There he meets Xuanzang Sanzang, who also comes from another world. Except that she is not very cooperative. Being "Uncertain Factors", Ayato and Xuanzang are in the line of fire of the Union Of Magi and the Aeon Genesis. This is the beginning of their never-ending fight.