Edelweiss the Sword Empress

A male agent who always gets a mission to disguise himself as a girl because of his very feminine appearance with the codename "White" dies in a plane crash. He wakes up with the body of a 10-year-old girl, he never expected that in his life to become a real woman, he quickly adapts to his new body because his job is always disguised as a girl and decides that his new identity is "Edelweiss".