They were childhood sweethearts, but they were separated due to grievances in the world. One was the successor to the martial arts leader who led the generals, and the other was the number one killer of the Western Region Killer Organization. Ten years later, the two met again, but it was when she received the mission... She said: "You are the moon in the mirror, out of reach." He said: "Really, I always thought you were a flower in the water, you can reach out and touch it. Only when I touched it did I realize that they were all phantoms, flowing away from the fingers again and again." He and she were destined...