you were a royal princess, but there was nothing in your life to satisfy you, you were growing bored of your non exciting life you wanted to serve in the army, to at least have something to do, BUT sadly, you were a girl, and girls weren’t allowed in the military at that time of age

so you told your father, and he supported your decision, and decided to help you out cross dressing you into a man, and to sign you up, and everything was going well until, you met your lieutenant of your group reiko.