When Tristan Blackwood awakens, he finds himself in a Matriarchal world where only women can wield power. A century ago, a mysterious force reshaped the Solarian Continent, overturning all gender roles. Ten years ago, Grand General Olga overthrew the Blackwood Dynasty and crowned herself ruler. Now the last Blackwood heir is nothing more than a prisoner in the Shadow Palace… until he awakens the Sovereign System. Mission: Become the first man to claim the throne in a world built to forbid it.