I'm working my way through the archives from 2004 and just reread Wrenlet's "Learning Curve" which reminded me of a fic I read once where, for some reason, Ben ended up moving into the loft with Brian and Justin and they lived together as a quasi-threesome. I think. I don't remember why for sure, but I think something happened to Mikey, and Brian & Justin spend a lot of time with Ben to comfort him and he just sort of never goes home. I don't remember if it was a WIP or good or bad, just that Ben moved in. Ring any bells for anyone?
ETA: Found, thanks to
seanmegansean. It's called
Drifting Along, and was written a few years ago for the
Snowin' & Blowin' Challenge. It doesn't have the author's name on the fic, so if anyone knows who wrote it, please respond and I'll edit this to add the author's name.
ETA-2: Since I mentioned Wrenlet's
Learning Curve in my original request, I figured I might as well post a link for that fic, too. :)