This show had SO MUCH PROMISE in the beginning. I was looking forward to getting this anime off my "planned for later" list, but alas, it did not live up to the expectations that I had in mind. The first couple of episodes were honestly God Tier and made me want to binge, however, I believe this anime fell into the 12-episode curse, where so much started happening, that nothing felt important, and lost its way. By what I recall the 5th episode, this show started feeling like a chore to watch and stopped being entertaining. I couldn't tell you the premise after that episode. I think it banked off the gore aspect and put little thought elsewhere.
If you want to watch this show, go for it, I am sure there is an audience, because it has become a cult classic. but in the end, I was left feeling very underwhelmed.