A huge creature has suddenly appeared in Tokyo Bay. Behind its appearance is the Shiromori Shuu, a secret society that has been controlling Japan from the shadows using occult powers. However, at that time, there existed in Japan an organization to preserve the peace called ASY. The monster is completely unaffected by ASY's fierce attacks. Just when they thought it was all over, a large shadow flew onto the scene. ASY had a trump card. Its name: Ginko. With overwhelming power, Ginko drove the monster into the open ocean and finally annihilated it. The plan a success, a bright light flew to Ginko's chest and a strange scene appeared. The figure of a floating girl, wrapped in light...