Retired at a young age, Hunter Kang Sang-ho. By chance, he meets a high school girl and begins to teach her swordsmanship. However, a week later, he sees the news of her death, prompting him to make a life-changing decision: he will become a teacher at Hunter Girls’ High School. His goal is clear – to teach properly, ensuring that no more lives are lost. “I may not have had a proper education because of the war, but somehow, I’ll make it work.” But then… “Teacher! She keeps grabbing my tail!” “What are you talking about? You hid my sword first! Give it back!” “Teacher, can we go out to play?” “Teacher, I’m not feeling well…” Teaching these kids is proving to be more challenging than he ever imagined.