Dark Wen Yuan AU where Wei Wuxian still lived and A-Yuan grew to be his disciple. WWX doesn't leave Burial Mounds and A-Yuan meets with other sects on his behalf. He doesn't hate LWJ, he's still fond of him, but him and WWX have a wrong perception about what happened
They think LWJ attacked WWX with all the rest during the fight at Nightless city. Of course WWX and A-Yuan don't know that LWJ actually saved him and suffered the punishment for it. THEY DON'T KNOW ABOUT THE SCARS ON HIS BACK AND BABY DOESN'T REVEAL IT TO THEM!
Anyways Lan Wangji has not seen Wei Wuxian for 13 years, because wwx closed himself off with the strongest fucking barrier known to the cultivation world. (YES. It's our genius YLLZ), and only sees Wen Yuan from time to time.
However in this au, 13 years later there have been very fierce attacks that the cultivation world cannot handle and they think it's the Yiling Laozu at work again of course, so they plan to make another siege. LWJ hears of this and hurries to see WWX and talk to him, to find out if it was really him who caused it (although he's the only one who doesn't believe it), and to warn him as well. He's very nervous because he's never seen WWX since 13 years ago and WWX never showed himself and neither replied to his confession.
So LWJ kinda understood this as his decline and let him be. BUT NOW BABY HAS TO GO UP THE MOUNDS. And that's where they meet again for the first time. With WWX wearing this cloak (I had too, it's sexy ok?) and still demanding to respect Hanguang Jun even after all that happened :’(((((