Aidan, a fresh recruit in the Knights of Cygnus, has harbored a single dream ever since the moment he first saw the Adversary, the hero of the Alliance. Like that man who single-handedly changes the battlefield, he too would one day become a hero to save this world. 　　However, the battlefields where the Knights of Cygnus fight to protect Maple World are nothing but harsh. 　　As Aida...