The protagonist, Yuiner Crombelz, a reincarnated individual serving as a lieutenant in the Schwedel Empire's army, finds himself in the midst of a brutal battle against the Kingdom of Agan. Despite his own aversion to war, he diligently commands his platoon of fifty musketeers, urging them to fire relentlessly. The battle is fierce, with casualties mounting on both sides. Yuiner possesses a unique ability, which he calls "Death God's Scythe," allowing him to sense impending danger, a skill that saves him and his subordinate from a devastating artillery shell. Recognizing the dire situation, Yuiner orders a charge, leading his remaining troops into a close-quarters melee where their bayonets prove effective against the surprised enemy. Though his platoon suffers heavy losses, they secure the strategic pass and capture enemy artillery.
Following this engagement, Yuiner is summoned to the Fifth Division headquarters. His platoon is disbanded, and he is relieved of his command, earning the moniker "Death God Crombelz" due to the high casualty rate under his command. However, his battlefield prowess is acknowledged, and he is offered a promotion to staff officer. He accepts, eager to escape direct combat. He is then transferred to the newly formed Sixth Special Brigade and is met by a mysterious, elegantly dressed woman who claims to be a member of the influential Litreille ducal family. She hints at future support and expresses admiration for his military achievements.
Upon arriving at the Sixth Special Brigade's remote mountain headquarters, Yuiner is surprised to find it staffed almost entirely by young women. He is greeted by Hanna Heiden, a formidable female sergeant major, who is initially mistaken for a civilian. Yuiner presents his transfer orders and is led to the brigade commander's office. To his surprise, the commander is a young woman, Colonel Alzer Medillen, who reveals that the brigade is an unconventional unit. Alzer, a member of the powerful Medillen ducal family, one of the "Five Royal Houses," explains that the brigade is a contingency measure due to political instability, particularly concerning the Litreille family.
Alzer tasks Yuiner with training the brigade's sole unit: a company of 150 female infantry soldiers. She acknowledges his unique skills and the difficulty of finding suitable officers for this unusual command. Yuiner, despite his initial reluctance, accepts the role of acting company commander, recognizing the importance of preparing these women for potential conflict. He begins their training by emphasizing the harsh realities of warfare, the importance of discipline, and the necessity of speed and formation integrity. He also introduces basic literacy and numeracy, arguing that these skills are crucial for both military effectiveness and future civilian life, particularly for women with limited options. Yuiner's unconventional approach, focusing on speed and practical application, begins to yield results, though the soldiers' physical limitations and initial lack of combat spirit present significant challenges. Hanna, the sergeant major, develops a strong admiration for Yuiner's kind yet firm leadership. Alzer, meanwhile, suspects Yuiner harbors a secret due to his unusual speech patterns and background, but his competence and dedication are undeniable. The brigade, despite its small size and unusual composition, is intended to be a crucial element in the empire's future, and Yuiner's role in shaping its soldiers is paramount.
