When history obsessed high schooler Oda Nobunaga and his sister step into a mysterious world, where all the heroes of the Warring Period come to battle, the resultant clash will see one crowned the greatest hero of them all!Perfect for fans of alternate history and historical fiction!After receiving a mysterious invitation to 'come play in Heaven' Oda Nobunaga and his sister are transported to a mysterious new world where the mightiest warriors from history will meet to do battle!Here the pair will meet legendary figures such as Napoleon, Julius Caesar, Zhuge Liang and plenty of others, to see who will be crowned the greatest of all time!