I watched this anime precisely because of the massacre that happened in the first episode, it gave me a lot of pain and I had to know what would happen next, I ended up liking it more than I thought, although I don't follow the manga anymore, I don't remember where I left it haha

Even so, it was an anime which I enjoyed a lot when it was released, so much that I went straight to read the manga to know how the story continued and it has a lot of very convincing twists.