Hi, thanks for letting us know.
My guess would be that you are browsing using a proxy service either enforced by your ISP or a school / office that blocks access to various websites. That world of final fantasy site has been blocked by them and for some reason put into a pornography category. It may have been auto blocked due to the word fantasy, or it may have been blocked by a person who didnt know what it was or just selecting pornography was the easiest option.
The site itself is a legitimate site run by Square Enix for the game.
If this post is irrelevant to the topic please ignore it.
It may be a test and it may be deleted shortly.