Looking for a specific comic. Hentai, involves a new teacher going to a school full of futa girls.

The teacher and the girls end up having sex, then somehow the teacher gets turned into a futa himself - or herself, after the transformation. It's a rather long comic, and the story was interesting. I remember a girl with cat ears for some reason...

I found it on lu.scio.us a few years back, maybe 3 or 4, possibly a small amount more.