It is hard, and awkward, but it's what Zizhen's been wanting for a while now so he can't bring himself to care, and after he gets over his immediate shock he tilts his head to fit their mouths together better, trying to show Jingyi by example how it ought to be.

One of the hands wrapped around him comes up to cup his cheek, brushing his thumb across it gently.

This is actually happening, he is kissing Jingyi!