He Fell to the Dark Side After I Died

My next novels: "A Gentle Blade (Quick Transmigration)" and "The Apocalypse Novel's Male Lead Wants to Kill Me." Please add them to your reading lists! P.S. The male lead has only ever loved the female lead, and he loved her from the very beginning. (For anyone confused by the blurb: Fu Xing is the female lead, Jiang Heng is the male lead, and Shen Li is Jiang Heng's fiancée.) Everyone knows that Jiang Heng of the Kunlun Sect and Shen Li are a match made in heaven. Once Jiang Heng avenges Shen Li's father, who is also his master, in the Ten Thousand Demon Cavern, he will marry Shen Li. So later, Fu Xing thinks that she loves Jiang Heng, while Shen Li saved her life in the Ten Thousand Demon Cavern. That becomes the sin she will carry for the rest of her life. Fu Xing sees Jiang Heng walking toward her, sword in hand. His eyes are filled with bone-chilling hatred, and the murderous aura around him makes the air feel frozen. Fu Xing has no doubt that, if the people around them weren't holding him back, Jiang Heng would kill her. But at the time, Fu Xing thinks that dying at Jiang Heng's hands wouldn't be so bad. Her sin is unforgivable, and she should pay for it with her life. As long as she lives, she'll remain a thorn in the hearts of everyone who loves Shen Li, and the longer time passes, the deeper that thorn will cut. Clinging to this thought, Fu Xing tries everything to defy fate, and finally trades her own life to bring Shen Li back. Watching Jiang Heng rush toward her, she thinks, This is for the best. Those who love each other will end up together. She will be nothing more than a sigh in their midnight dreams, gradually forgotten over the long years. But that's all right. It's better for the one who will be forgotten to die than for someone to lose the person they love most. The day Fu Xing dies, Jiang Heng falls into darkness and becomes a demon. Holding Fu Xing's body, he sits motionless on the frozen plain for ten days. Jiang Heng cannot bring himself to accept the truth. He thought they had thousands upon thousands of years together, an endless stretch of time, so he never treasured what he had in front of him. Theme: Treasure the present, so you won't be left with regrets after it's gone.