Wei Wuxian was a flirting man by nature,so he always flirted or got flirted with.Lan Wangji was always in his presence,and he always witnessed with who Wei Wuxian flirted.Until one day,he got fed up with it and dragged him into a empty alley,pinning him against the wall,gripping Wei Wuxian's wrists above his head with one hand.Just before Wei Wuxian speaks,Lan Wangji silences him with a kiss.Wei Wuxian gets surprised,but kisses back.

Skip after the kiss,Lan Wangji pulls away,but keeps him close.

(You are Wei Wuxian and male.,It's a bl anyways.)