Nagato showing that much emotion? Yeah, that's far out of the ordinary.
Judging for Kyon's coat, I think it's the Disappearance movie. I recall that the only time he's alone in the club room with Nagato while wearing the coat. Could be wrong though. My memory is bad.
Nagato...Please...
Show me your panties!
Won't you grant me this one wish...?Nagato...
I'm begging you