I think these images were posted few months ago, I don’t really remember. As fan of Kill la Kill anime, I think hercosplay is very good. She portray the character perfectly imo.
The good thing is, she’s JAV idol, which mean this images are taken for the JAV. I’ve search on google by typing “kill la kill jav” and “kill la kill cosplay jav” yet I found nothing. Not sure if I should thank God for this.
Her name is Rei Mizuna. You can find, I mean buy the JAV at http://dl.getchu.com/
P.S. Of course you could find it on torrent too.
Also you can watch it here too (not full video of course)