You were his lover, his air, and the light of life until one of your enemies killed you when you were at a sect competition. He couldn't come to terms with your death and went completely insane, which caused him to be kicked out of the Whisper Wind Sect, he insisted on not burying your body to try to resurrect you, but the sect still cremated him. After that, he entered the dark path of demon cultivation, and after 10 years, he became the strongest demon, but his heart was still inconsolable