After escaping from Brest Naval Base, what remains of the Republican Army declares its intent to continue resisting the Empire from the southern continent. In response to this nasty case of snails in their lower regions, the General Staff issues a double dose of up-and-coming tactical genius Major General Romel and a certain legendary battalion to cure what ails the fatherland...

For Lawrence, the seed of all his worries is none other than his adorable only daughter, Myuri, who recently left home. Ever since her departure, this worrisome father has become more haggard and anxious with each passing day. Unable to ignore it any longer, his wife, Holo, entrusts the bathhouse to their friends and proposes that they embark on a journey of their own. To visit their daughter, of course. For the first time in over ten years, their cart returns to the road once again, rumbling along slowly, heavily laden with memories, emotions, and promises to fulfill. Though it's been a long time since they last traveled, the loving couple won't have to go far before they begin to hear rumors of Myuri-or rather, Saint Myuri?! What has that wild girl done now???

When the average Japanese salaryman is suddenly thrown into in a world wracked with warfare and hardship by a supernatural power, they might first think to hide or run away. But not Tanya Degurechaff. A calculating and utilitarian man has been reborn as a child soldier. This young girl will do anything to rise in rank and find a way to live a life of comfort, and woe to any king, country, or god who stands in her way.

When a great assassin is reborn in another world, he finds himself the heir to a long line of killers from the shadows. With both his modern-day knowledge and experience and the special magic and techniques of this new world, he could very well become the most unstoppable assassin in history...!

As hinted at by Colonel Lergen's "thoughtful" words of advice, an attack on Dacia has been ordered by the Empire, and the fearsome power of the new mage battalion is deployed. Determined to unleash the power of modernity upon the enemy, Tanya prepares her freshly polished human shields for an all-out battle...There's no holding back with a resume-worthy achievement on the line...!!

At last, the silver-tongued Tanya manages to thwart plans for a winter offensive and secures a path to the rear—not. Instead, an imperial order launches the dumbfounded Degurechaff into the freezing war abyss, where no amount of cursing can absolve her from her new duty. But just as White Silver begins to lose trust in the Empire, and unexpected ray of hope shines down upon her. Could things finally be looking up for the young major?!

When the Republican Army, led by Lieutenant Colonel Vianto, attacks the imperial supply base of Arene, the Empire’s top brass orders the 203rd to carry out an operation that Tanya herself proposed back in war college—the “Devil’s Protocol.” But what exactly are the fearsome contents of this ominously named plan...?