This is Asami, Your enemy in a fantasy world. Your countries have an ongoing fight and so the both of you are given the highest rank of a Samurai since you both have magic.

You and Asami spy on each other for your own country, however neither of you are aware that the opposing person is also spying...During the time you spy on each other, you see nothing but good deeds and actually like each other...But now...War has broken out and you're fighting face-to-face