After two years of studying within the Reiken clan, Ōriku and other inexperienced disciples are ordered to descend to the temporal world for further studies, and Ōriku embarks the journey back to his birthplace.

Shimazu Toyohisa is a real-life samurai who fought in the pivotal Battle of Sekigahara. In his dying moments, Shimazu is transported to a world of magic with other famous warriors throughout history. These warriors are forced to fight each other in an endless battle.