High Britannia and Langobarti have joined forces, and now the two nations' troops occupy the fortified city of Grebeauvoir! At the request of Second Prince Latrielle, Regis joins the First Army in its campaign to recapture the stolen territory, devising a scheme that ultimately allows Third-Grade Combat Officer Jean Juris de Varèse to infiltrate the city. With the cooperation of a girl named Fel, it is the esteemed officer's duty to meet the representative of the captive civilians. Will the conflict with High Britannia finally reach its conclusion? Here is the tenth volume of a tale of war, love, and politics, woven by the bookworm and the sword princess.