Your Hand in Mine
"Ooh, this is fascinating." Wei Wuxian lifts his hand and—Heavens help him—Lan Wangji's hand follows. Because they're stuck. They're stuck. Their fingers are interlaced, and they can't pull them apart. "You know, I wasn't expecting this, but isn't it odd? It's obviously a curse, but so far, it's not harmful."
Oh, it is harmful, Lan Wangji thinks through a spinning head as he feels Wei Wuxian twist their hands this way and that, testing the limits of the curse. It is most certainly harmful.
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A curse brings Wei Wuxian and Lan Wangji together—literally.
(tl;dr a curse makes teen!wwx and teen!lwj hold hands. lwj, who is very much in denial about his feelings, tries his best not to panic and wwx decides that Operation: Make Lan Zhan My Best Friend is a GO. hilarity ensues)