Haah... so hot. It's so hot it makes me want to drink something carbonated.

Hey, Yura, could you buy something carbonated for me after you back from training?

What kind?

Anything will do. I'll leave it to you.

I'm baaaaack! Bought and brought them.

Here, the AAs. Originally the pun is that "carbonic acid" (i.e. carbonated) and AA (batteries) are pronounced the same, as /tansan/.

...eh? Ah, you want alkaline ones instead?