( He hisses through his teeth like a cat, plucking his hand back down. It's not fair to have his own antics turned back on him, especially when he's too out of his wits to deal with it. )

Behave.

( And then -. ) I won't tell your brother, because he'd probably behead me for saying the rules are stupid. ( Half-hearted, Lan Wangji was kind to him after all. He might have to deal with that at some point. ) It's not his business either way.