I posted this thread to a few other IBs but I'll be posting it here as well to spread the word
Yesterday I was watching a youtuber called Whang whom makes videos about tales from the internet, and he made a video that really grabbed my attention! It's a video about an ongoing internet mystery about this supposed lost anime.
The story goes like this: some time in 2015, an /x/ user on gaijinTITS posted in a thread titled "things you have found on the deep web". In this post, he said that sometime in 2011, he found an OVA for a really obscure 90s anime. The title of the anime was in Japanese but he remembers seeing some English words that said something like "Go For A Punch". The anime itself is a very grotesque gurofest. It's about 9 girls who get trapped inside of a bathroom with no way out. You see how their sanity begins to break and at the end, they all commit suicide in some very graphic ways. One of them smashes her head open, another one asks to be drowned, ect.
You should probably watch the video to catch up with all there is to know so far
https://www.youtube.com/watch?v=dEPveDQXNXgIf you have absolutely any leads or ideas, no matter how small, don't hesitate to post them here! Any bit helps!