It got reaaaaally hot, for some reason.

Indeed. It's quite an effort for even Shiranui to bear this heat.

Aaaahh... What do you call this again? This kind of amaaaaazingly hot day.

It's Nenohi! (in falsetto) The first Day of the Rat in a new year.

Hmmm...

She's probably thinking something like "How strange, Kuroshio told me this absolutely should have tickled his funny bone..."

Bulls-eye.