I'd like to point out that I've never ever watched a whole show from start to finish before -- even Hikago, I watched pretty slowly, randomly watching episodes. In fact, I can't think of any other show that I watched a. in order and b. completely.
Sadly, my Chinese is definitely not up to the task of reading the original novel, and the online translations seem to only be for a few chapters.
The (English) fandom, or at least the AO3/pinboard recced part of fandom, seems quite small. I think I've at least read the first bits of all the 93 fics currently up. I guess most of fandom is generally on tumblr, but scrolling through tumblr makes me confused... Will just have to keep trawling AO3.
Basically: I should never get into a show that has a super tiny fandom because it just leaves me dissatisfied without long epic fics / meta to roll in.