Dear SE, NOBODY asked for under wear changes, just race unlocking Hempen sets.

[Niwashi]

Nobody asked for under wear garment changes when you remove a piece of gear on Torso/Bottoms/Feet.

Well, not for torso or bottoms anyway. For feet, on the other hand, it has been requested (but that's a different topic than the hempen sets).

But those are (1.0) underwears

"were" =/= "are".
These are not underwear. They are regular gear items whose designs (most of them anyway) were based on something else which had formerly (in a game that no longer exists) been classified with underwear. But in this game they are not. It's mistakenly calling them underwear that led to the confusion this thread is about. That's why Yoshi mistook what it was that was being requested and thought it involved a feature change rather than just an item change.

(As for the designs, I suppose a few of them might work as underwear, but that's not the first impression you'd get from looking at them, and it doesn't fit at all for some. For example, the elezen Hempen Camise looks more like the upper half of a formal evening gown if you pair it with a skirt rather than the pantalettes. And the female Auri set is just casual summer wear. Neither are something you'd wear under other clothes.)