If you have an account you'll see his last upload is actually today. It's an R-18G piece, the reason why people without account can't access it.
www.pixiv.net/member_illust.ph…Try this link, I don't know how it'll turn out for you but it is supposed to have a big sign of signing up and view the pic covering the artwork. And you can see the uploading date is today.
*you also have to be over 18 to view even if you have an account*