Razor's Edge by colorguard28
Pairing: McGee/DiNozzo (McNozzo)
Rating: NC-17
AAHHHHHH. Okay, I truly love this story. Mainly because the author almost seamlessly integrates it into canon season 6 and 7. It brings depth into Tony and Tim's relationship, and clearly makes into slash, but still, we all know that as much as they irritate each other, Tony and Tim are clearly besties. This story, and the series it's the beginning of, recount their relationship's gentle growth, the difficulties they face, how they hide their burgeoning relationship from everyone until they can admit to it. This story will suck you in. And you will be amazed at how in character the author manages to keep Tony and Tim!
This can be found here. I like it at NFA more than fanfiction.net, even though it can be found there, because you can read the entire story one page at NFA.