Pear Blossom Broken Rain

At the end of the story, the protagonists live happily together, but Lu Youran is not so lucky. Although he and Qin Huai went through many hardships to get together, within five years he married a concubine and turned a deaf ear to her. In the end, Qin Huai actually killed her with his own hands. But not only was he and she reborn, she actually didn't die. What is the reason for this? No matter what, this time they will have to pay the price.