The animation style in this is just fantastic, I've never seen anything like what you've done there.
The voices suited it all really well too.
Story was awesome, all linked in well...Kinda obvious that the guy was the tentacle thingy from the start though. Thats what I liked about it :P
P.S. I'm expecting you to make the scene where she is being raped by the tentacle thingy as a hentai...MAIL ME WHEN THIS IS MADE