Yes, I thought that was "the kissing picture" too. I mean the one that nine_rainbows was referring to. I like the idea that it's the moment Uruha kissed Aoi too, but if that's it then the kiss wasn't during Kantou Dogeza Kumiai, like I've read. That song was before the encore and this is obviously a moment after it (the shirts). But I've watched Kantou Dogeza Kumiai from NSLG video and I really don't see when was the kiss supposed to have happened. There doesn't seem to be a moment where they're close enough to kiss.
Sorry, I'm kind of playing detective here. Got carried away.