I found this fic about a month after completing both manga and the anime. I wanted to read it because it was labeled "suspense", the first I'd seen in a long time without the label "romance".
The story itself is over 150 pages long, solid. You have been warned.
It's worth it.
The Beloved Helpless is far and away the best fanfiction I have ever read, and dare I say I prefer it to series canon. However, I must also tell you that I cried more in a single chapter of this story than I did for any other full-length film, novel, or anime. It is the single most heart wrenching piece of fiction I have ever come across in my life.
The beginning is a bit painful, as we see the more nasty sides of our protagonists, but as the story progresses the characters develop beautifully. Reading Jaokolad's interpretation of many of these characters actually helped me to understand them better in canon. Romance is there, but no plot tumors
arise. The plot itself unfolds very quickly, and progresses surprisingly well for, well, a fanfiction.
I would recommend this to anyone with a strong stomach. I say that not because of gore, but because of the high death count.