MY RETAINERS ARE MY STRENGTH Beset by an unprecedented wave of monsters, the group of small to medium-sized countries known as the Union of Eastern Nations is in dire straights. Requested to send reinforcements to their aid, Souma dispatches troops to the Kingdom of Lastania—where Julius, former crown prince of the Principality of Amidonia, is currently holding the monsters at bay. And so it comes to be that Souma, standing shoulder-to-shoulder with an old foe, must depend on his retainers’ strength to save Lastania...

My retainers are my strength. With a massive number of monsters appearing in a "Demon Wave," the group of small to medium-sized countries known as the Union of Eastern Nations faces a crisis. During a conference with Empress Maria of the Gran Chaos Empire, Souma is asked to dispatch reinforcements to the union. The place Souma sends those troops to is the Kingdom of Lastania. Which is where a former foe, the crown prince Souma once drove from the Principality of Amidonia, Julius, is putting up a hard fight as a visiting general...?! And so, standing shoulder-to-shoulder with Julius, Souma uses his retainers' strength in an operation to save Lastania! The revolutionary administrative fantasy series, volume eight!

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!

"Starting today, I will formally become the king of this Kingdom of Friedonia." Having returned from the Union of Eastern Nations and rested awhile, the ceremony that will turn Souma from a provisional king to the true king is rapidly approaching. Because Souma's marriage to his fiancées is to be held on the same day, the capital gets more lively than ever! Meanwhile, using his own marriage as an impetus, Souma encourages his retainers to get married, too. Those who are already engaged to be married, those who aren't ready to be husband and wife yet, those who haven't even recognized their own love—Souma shows concern for all his retainers' different circumstances... The revolutionary administrative fantasy series, volume ten!

Let the good times roll! It's festival time in Tempest, and this demon slime knows how to throw a party! After reconciling with Hinata and the Western Holy Church, Rimuru's pulling out all the stops to prepare a massive bash in his nation of monsters-with a little help from his many friends and allies! It's the perfect opportunity to debut his new demon lord title while showing the world everything the Jura-Tempest Federation has to offer. Will this big event go off without a hitch?

A GIFTED STUDENT With Souma’s coronation and wedding behind him, he’s ready to send his little sister Tomoe off for her first day at the Royal Academy. But from her first step through the gates, she’s greeted with comments and stares from the other students. Tomoe’s adoption, her gift, and her older brother are drawing a lot of attention...good, bad, and possibly even dangerous.

A DANGEROUS PRIZE When Souma receives an invitation to a martial arts tournament, he has no plan to attend until he discovers two things: first, the grand prize is a single wish, and second, the daughter of his kingdom’s former general will be participating. Her father was arrested as a traitor, and she has every reason to hate Souma and the Elfrieden Kingdom. Now, he’ll have to discover her true intentions before she gains the power to start an all-out war.

Two years have passed since the Spirit King’s Curse shook the world. In this time, Souma and the Kingdom of Friedonia have been preparing for an impending period of unprecedented chaos. However, the Kingdom was not the only country to burgeon over the two years. Fuuga has been expanding the border of his Great Tiger Kingdom of Haan as well. Following the acquisition of the Lunarian Orthodox Papal State, Fuuga sought to bring the Mercenary State Zem under his control. Now, having gained such powerful forces, he declares war on mankind’s greatest nation—the Gran Chaos Empire. With this move, an agonizing question now hangs in the air: should the Kingdom abandon the Empire, their ally, to avoid conflict with the great Fuuga Haan? The cruel war begins in volume sixteen of the revolutionary administrative fantasy series!

A new nation, the Kingdom of Friedonia, is born and Souma becomes its new king. He broadcasts an educational program and is gradually working towards the enlightenment of his people when he makes a visit to Lagoon City, a city on the water which is ruled by Excel who has been appointed the Supreme Commander of the National Defense Force. There he finds Castor, the former General of the Air Force who Souma once defeated, waiting for him. When Castor becomes suspicious about his sudden visit, Souma reveals the National Defense Force's top secret project?! "You... What in the world have you created...?" When Castor is struck dumb by the unimaginable sight he witnesses, what will the order Souma gives him be?! The story moves on to the next stage! The fifth volume of the revolutionary transferred-to-another-world administrative fantasy!

Risking her life to save her homeland, Shabon, a princess from the Nine-Headed Dragon Archipelago, joins Souma's side in hopes of stopping an impending war. But with a fleet already en route to the hostile archipelago under his orders, Souma sets out to infiltrate the islands before they arrive. As he gathers information within the enemy territory, he finds that the real threat isn't their naval fleet, but a massive creature in their waters that defies all common sense...?! What strategy will Souma come up with to handle these two encroaching threats?! Find out in the thirteenth volume of the revolutionary administrative fantasy series!