Heaven Official's Blessing: Tian Guan Ci Fu (Novel) by Mò Xiāng Tóng Xiù
While the link shows information for the first part, I got the chance to read all of it. It was beautifully put together, a slow-burn romance across many lifetimes influencing the world around them. Everything was so interconnected that it made me read it multiple times as well as watch the animation that had come out (I think on Netflix). Also multiple times. It's endearing and magical in a way that cheers me up whenever I read/watch it. There's also a good amount of comedic relief in between to offset some heart-wrenching moments.
Excerpt: