I do not know, did you have Nao personally or just admiring the pictures? I had Nao - would not recommend. My experience was not very good. Very passive, no initiative whatsoever, very mediocre hj, shower plainly terrible. She is also quite old, IMHO her pictures are great - real life experience is something different. Having said this, your experience and mileage may be different.
I would not say Yuna is all au naturel down there. Her front is not shaved, but either it's just sparsely populated or she did some plucking, because it's quite transparent so to speak. Down below it's all very clean and there is no hair. One turn off though she does not want you to finger her, and I mean no fingers in there period... tongue is ok though but that is for another evening/story.