Johnny immediately stopped tugging on his own collar when Kyo mentions them tightening, and is about to follow it up with a question when he hears Reno say Kyo's name. Johnny's mouth shuts instantly.

Well. This was weird.

Feeling awkward, and trying not to eye up Kyo too much, he decides to answer Minfilia instead.

"Whatever it is, it better be quick. I don't like whatever the deal is with these collars. How come you got away without one?"