The story is called ER or OR and it's yaoi fanfic.
It's a story about the Naru cast being either ER/OR interns or ER/OR doctors training the interns.
I can't remember who wrote it, but I know the pairings were Sasu/Naru, Shika/Neji just to name a few and it was only a couple of chapters long so far. If someone could find the link for me it would be great!!! Thanks!