There is usually visible steam appearing when feet/ arm pits are exposed. That I have learned from japanese drawings.
Doesn't make much sense but oh well

CornixCantor said:
There is usually visible steam appearing when feet/ arm pits are exposed. That I have learned from japanese drawings.
Doesn't make much sense but oh well

It's meant to denote...uh...odor.

It's stinky.

Hot sweat on a cool night will evaporate and condense as steam. I used to see it all the time back when i played (NA) Football. You get pretty hot and sweaty under those pads.

If you wanted a realistic explanation.

But i am also in agreement with Emmy, it is likely to show a steamy "scent"

I used to think it was related to heat too, but then I read an actual explanation that was basically what Yume said. I was like, "...Oh 😬"