The Subjugation War Begins! With supplies carried, plans made, and alliances forged, Souma's mission to subdue the rebelling nobility has begun. With a pocket full of tricks, loyal subjects, and modern knowledge, this should be easy! Well... not if you want your civilians to escape unharmed. Or if adventurers keep treading across the battlefield. Or if your nosy neighbors think this might be the best time to launch an invasion of their own. Still, rational thinking will prevail... right?

"O, Hero!" With that cliched line, Kazuya Souma found himself summoned to another world and his adventure--did not begin. After he presents his plan to strengthen the country economically and militarily, the king cedes the throne to him and Souma finds himself saddled with ruling the nation! What's more, he's betrothed to the king's daughter now...?! In order to get the country back on its feet, Souma calls the wise, the talented, and the gifted to his side. Five people gather before the newly crowned Souma. Just what are the many talents and abilities they possess...?! What path will his outlook as a realist take Souma and the people of his country down? A revolutionary transferred-to-another-world administrative fantasy series starts here!

The Gran Chaos Empire is the largest nation on the continent and the leader of the Mankind Declaration, a united front against the demons. Amidonia uses part of the text of that declaration which states, "The moving of national borders by force will be deemed inadmissible," as their shield, borrowing the might of the Empire to demand the return of their capital, Van, but Souma refuses. And so, negotiations begin with the Empire's envoy, Jeanne, the younger sister of the Empress. "We do want to enter an alliance with the Empire. A secret one." With the tempest of war behind them, the goals of the different nations send sparks flying in the seventh volume of this transferred-to-another-world administrative fantasy series!

Granted a reprieve from external threats, Souma turns his attention to issues on the domestic front. Countless refugees have been displaced from their homes by the Demon Lord’s Domain and now reside illegally within his country’s borders. With no ideal solution in sight, Souma confronts the problem with conviction! He arranges a meeting with their leader and proposes an ultimatum: “You have to choose. Will you abandon your longing for your homelands and become citizens of this country, or will you leave?” Now torn between a yearning for their origins and a desire to find a new place to call home, what will the refugees decide? All this and more in the tenth installment of this transferred-to-another-world administrative fantasy series!

Treachery upon Intrigue upon Deceit! The war between Elfrieden and Amidonia continues, with Souma and Co. being held off outside the enemy capital. With personal loyalties and strategies being put to the test, is victory really within sight?

With the intense conclusion to the war against Gaius, the warrior king, the long period of conflict that transpired from the civil war comes to a close. Amidonia now occupies the capital of the Principality, Van, and Souma sets about preparing for the challenges that await him in a post-war world. "This is where the king's real work begins." Using an unorthodox plan, Souma aims to win the hearts and minds of Van's people. He keeps the importance of his comrades, who he has grown closer to during the war, in mind as he takes his next steps as king.

Julius, Sovereign Prince of Amidonia, resumes his tyrannical rule after retaking the city of Van. However, after experiencing freedom, the populace revolts, sparking uprisings throughout the Principality. By popular demand, Souma is returned to power in Van, and shortly thereafter, he annexes the entire nation as a part of the Kingdom of Friedonia. The Gran Chaos Empire, leader of the Mankind Declaration, cannot let this stand. But when Empress Maria presses Souma on the issue, he finally tells her of the contradiction in her ideals. New personnel will move the country as the revolution continues onward!