Teenage Mercenary EN
At the age of eight, Yu Ijin was the sole survivor of a plane crash in a foreign land. To survive, he became a mercenary a child soldier forged in the fires of endless conflict. For ten years, he knew only the language of lead and steel. But after being rescued and returned to his family in South Korea, he faces his most daunting mission yet: High School. In a world of grades, social cliques, and petty bullies, Ijin is a ghost from a world they couldn't possibly imagine.
high school soldier story, mercenary back to school, bodyguard action manhwa