Senyuu.

Long ago, the Demon King Rchimedes brought havoc and destruction to the Human World. The great hero Creasion sealed him away, and peace returned. A thousand years later, Rchimedes has reappeared. A hole has opened in the Human World, and countless monsters have emerged from it. To prevent further devastation, the King calls upon all seventy-five probable descendants of Creasion. Among these descendants is Alba, number forty-five. The story centers on his adventures alongside Ross, a royal soldier appointed to assist him. Together, they are drawn into the conflict threatening the world as the descendants of the old hero are gathered to confront the returning Demon King and the monsters unleashed upon the land. Their journey follows Alba and Ross as they face the challenges set before them.