The tension was palpable and absolutely hilarious. :D
And then, Kana-chan to the rescue!
"I haven't been looking at anything besides your boobs, Harumi-san."
Well, that's a big part of the problem, really. Although the jealousy this time may have made Chiaki realize that she needs to learn more about Hana herself, so meeting like this may have been a good thing in the end.