Ugh, it's hot out... I'm back...

You must be tired. Here's a drink.

It's kind of sudden, but isn't
"汗(ase)" called "sweat" in English?

Okuu's sweat... in other words, "Sky Sweat"... She's referring to "Pocari Sweat", a type of soft drink sold in Japan. Yes, it's actually called that.

It kind of sounds like a name for a refreshing beverage!

In other words, Okuu's sweat is a drinkable beverage! So it wouldn't really be wrong if I licked her

Ah, sorry. You want some, Orin?

No thanks. I've got my own, so I'm good.

Thanks!

Thanks!