Grandmaster of Demonic Cultivation: When Dreams Fade, Old Friends Return

[Grandmaster of Demonic Cultivation fanfic | WangXian | No breakup, no reversal | Apologies for OOC] How does that saying go? [The best in the world is scary enough, but the best in the world after losing his wife is even more dangerous.] But when Wei Wuxian died, Lan Wangji never got to see him one last time. They had never even made their relationship official, so he couldn't even call himself a widower. Lan Wangji thought he would have to spend the rest of his life with that one stolen kiss. Then, by chance, he found an ancient book. A book that could send someone back to the past.