The pose was made on a male viera model, the tail is not part of it.

It hasn’t been tested on other races, also there will be some clipping, weird positioning as this was inspired on the following reference: https://www.pinterest.com/pin/653444227195065052/

If you would like to attempt what I did, below are some links what I used:
Tail: https://www.glamourdresser.com/mods/shadow-dragon-tail-for-tbse
Mist: https://www.xivmodarchive.com/modid/76660

Do not:
• Claim the pose as yours
• Use the pose for profit