An ass that fine is rare in any part of the world. In asia, I would think nearly impossible to find.
As an ass man myself, that is the biggest disappointment in mongering in Asia. I love asian girls (thai, chinese, korean, filipino) but have a hard time finding any with a great ass. There are always a few with good ones, but none like the black or hispanic girls I see in the US or other parts of the world.
The one benefit of asian girls not having an ass like Keyra Agustina is that I can usually put them into one of my favorite positions - the flat dog. This is where you are screwing the girl from behind but she is laying flat on her stomach. This not only give stimulation to my dick, but also the base and the area just above my dick in the groin area (sorry if that is too much info
) If I tried this would Keyra, I may need a 10 inch cock just to reach her pussy.