A what?
Also, linking this so it doesn't get lost.
EDIT: Reposting: Note. I'm not trying to make an OOC debate in the MW thread. I'm simply trying to model how I think Kaito would respond to the situation, especially taking into account the stress from last night. Even if the shrine has a supernatural calming effect, Kaito would still want answers.
That said...You don't have to give him every answer. If you don't want to respond, have Sayaka or Haruaki rebuff him and say something like "we won't talk of this further, and that's final" or "I'm going to leave that decision up to you", or...really, anything like that.
Kaito is engaged in a conversation. If you want to shut him up, shut down his part of the conversation. Have one of them say "Kaito, be quite now and let others talk and ask questions" or the like. He'd likely do so, if not like the situation.