Wei Wuxian meets Lan Wangji one night when the moon is full and high in the sky, and since then he thinks he hasn’t stopped smiling once. There’s just something about Lan Wangji, after all.
Or; 5 times Wei Wuxian smiled at Lan Wangji, and 1 time Lan Wangji smiled back.
Source: You Are My Euphoria, by tangerinechar – 魔道祖师 – 墨香铜臭 | Módào Zǔshī – Mòxiāng Tóngxiù [Archive of Our Own]
A lovely, lovely canon-divergence set during their school days at Cloud Recesses, where everything is happiness and nothing hurts.