He is utterly, utterly stunned. It is not that he did not think Wei Ying capable of such love or even entirely that he is surprised Wei Ying loves him, although that is part of it. Lan Wangji is cold and unfriendly and rigid and he knows Wei Ying could find someone easier to be with.

No, it is also that after years of turmoil and strife and actual death, he'd not known if Wei Ying's heart could make room for this sort of thing. He realizes he can feel his eyes burning and ducks his head to press his forehead to Wei Ying's chest, nodding. "Yes, like that," he manages, throat aching as he kisses Wei Ying's bony shoulder.