From the back of the book:
While the Shinkoukenjin are the decendants of the four gods of Kyoto, there were at one point more than them. When Oda Nobunaga lead an army of demons on Japan, the sacrifice of three of the races sealed Nobunaga away forever... Or so the world thought. After corrupting the three races, Nobunaga rebuilt his armies, drilled a hole into Jigoku, and restocked his armies. He is now ready for war, and the Soul Society isn't getting involved this time.
This item is a fan-created game product that uses images in a copyright-infringing manner.