As far as I know, that particular chapter is still listed, but I have no idea if any of the tags are controversial and therefore the work being hidden.
Welcome to Bunny Academy
Artist Kojima Saya
Magazine Comic X-Eros #33
Subscription contents are *not* purchased. If the content is purchased (
book,
doujins), it will remain available in your library. An easy way to tell is to check if there is a "Buy" button and a "Download" link.
That said, I do not know what license and contract FAKKU has with the Japan publishers and the artists. Personally I wouldn't be surprised if the artists and the Japan publishers reserve their right to pull subscription contents.