http://i.imgur.com/4e0U3Gh.jpg It is a copy paste costume, but is not a fetish or colaboration, and looks good, and fits ayane, i'm getting it for sure!
Well technically it can be classified as a fetish since it's popular in Japan like certain other ones but they look ok, probably gonna get Naotora's original SW one
Everything in Japan is a fetish, but kimono and yukata are certainly more sophisticated and not immediately associated with sex, unlike nurses, schoolgirls, et cetera.