Does anyone remember the story?

Does anyone remember the story Conctere Angel. Just today I was thinking about it but when I searched for it I found out it's not here anymore. Well it was this awesom story, it was a sequel actually. It was a frerard where Gerard is in a mental hospital after he killed Bert. And Frank is with some guy, and one day he decides to visit Gerard or something like that. I don't quite remember cause it's been a long time since I've read it. And I just wanted to know if anyone knows what's happend to that story, cause I would really like to read it again (if it's possible).