Does anyone have any idea what the name of the hentai is that I’m thinking of?

*All I am trying to do is ask a question, but apparently I need to post a link in order to ask it so I just picked a random one. Enjoy.*

So, recently I was thinking of sitting down and watching hentai and I remembered one that I thought was very good and very well animated but I just can't, for the life of me, remember what it was called.

What little details I can remember about it were this:

1. It was 2D animated.

2. It was older. I'm pretty sure it wasn't old old, but it didn't have the look that a lot of 2000s hentai seem to have. I realize that is a bit vague but it's all I can think to say.

3. I believe its animation was pretty good even by hentai standards.

4. Plot-wise, all I really remember was that there was a scenario in the hentai (I don't know if it had multiple episodes or anything) wherein a woman was gangbanged by a bunch of men inside a large cage. I think that these men were drugged or something because they were behaving kinda like zombies. And near the end of the hentai, one of these mens' penises is chopped off somehow in some way.

Please let me know if you know what this hentai is called.

Thanks.