Sorry to read about your experiences. Every now and then the k-girl agencies send us a dud, can't expect them to hit every ball out of the park. Incidentally, was she really Korean or was she something else, say Chinese? The Koreans do it best but I have yet to see these agencies bring in a highly-rated lady of Chinese descent.
As well, Lorihouse has been able to poach the better VIPOTG ladies by offering them a better return - I am sure many have noticed the defection of VIPOTG ladies - and I think this leaves VIPOTG with the B-list, and C-list and D-list, Asians.
Especially sorry for you Vault101, first k-girl session should have been good. See Haru from Lorihouse, she will restore your confidence.