She is lucky, because she has been gifted since she was a child. When she grows up, she is extremely intelligent, has excellent martial arts skills, and has a peerless appearance.
She was also unfortunate because her only brother ran away from home when she was ten years old and disappeared without a trace. Her usual coldness made her almost never have a confidant.
He met her out of the blue, and everything that happened after that was also out of the blue. Even after they became close friends, they were still at odds with each other, and they themselves couldn't predict the outcome...
Perhaps all this unknown can only be allowed to drift with the tide...