Shimai Youhei

Seventeen-year-old Rinko Isumi never intended to become a soldier. Viewing the opportunity as nothing more than a simple part-time job, she submits an application to a private military company, completely unaware of the reality that awaits her. Instead of mundane tasks, Rinko is abruptly deployed to an active conflict zone in a distant foreign country. Thrust into a dangerous warzone far from home, she quickly realizes that her casual decision has placed her directly in the line of fire. Fortunately, she is not entirely alone. Rinko is paired with Nagisa, a seasoned veteran mercenary who serves as her guide through the chaos. Everything around the young rookie is deeply unfamiliar—the treacherous terrain, the spoken language, and the local culture all present overwhelming obstacles to someone who has never experienced true combat. With no prior knowledge to rely on, Rinko must depend entirely on Nagisa’s hard-earned expertise to navigate this hostile environment. Under the veteran's watchful instruction, Rinko begins to absorb the harsh lessons of warfare. Step by step, she transitions from a naive teenager into someone capable of understanding the brutal demands of her new occupation. Through relentless hardship and unwavering mentorship, she slowly masters the essential skills required to survive in a place where a single mistake could cost her everything.