Concubine, You Must Belong to the King Versus the King

She is the proud daughter of the modern hidden sect, and the king of the night who walks in the darkness; he is the king of the God of War whose life experience is a mystery, and the underground king who controls life and death. Once they meet, fate will bring them together. See how she and he fall in love and kill each other. They join forces to compose a song that will be passed down from generation to generation.