Read Teenage Mercenary manhwa online in English, a high-octane action story featuring elite combat skills. After surviving a plane crash, young Ijin Yu endures a decade of brutal warfare as a professional mercenary. He finally returns to Korea seeking a peaceful life with his long-lost grandfather and sister. This modern world operates under strict social hierarchies rather than open battlefield rules. Dangerous school bullies and shadowy corporate enemies threaten his family’s fragile safety. Ijin utilizes lethal military tactics to dismantle every threat lurking within the high school. A mysterious organization from his dark past is slowly closing in on his location. Ijin is protecting his loved ones while neutralizing violent threats across the city.