Sirius was the best secret agent the world had ever seen But after being killed in action to save his comrades he is reborn in a strange new world LiterallyThe only regret from his previous life was that he didnt get to see his students grow up So with his knowledge and experience from his previous life Sirius sets out anew to travel this strange world changing the lives of those he meets along the wayTo some hes a beloved teacher to others hes a...