Looking in the mirror

"The moon in Shura city was extraordinarily round that day. I only remember a man holding me tightly. At the happiest moment he thought, I stabbed him in the heart with a silver hairpin full of evil Qi. He was unprepared..." a girl who didn't know anything about the world strolled through the galaxy and met a ghost king in the hell of life and death. Because of an embarrassing first encounter, she became his personal maid. She gave him a full red moon to accompany him day and night. But no one can remember that long ago, he first met her in a corner of the water and sky, and the spirit contract formed by half his heart became a sharp blade to kill him