I know of a couple. One of them's het, though.
http://www.fanfiction.net/s/4594472/1/Hide_and_SeekI think this one might've been linked before. It's Suzaku/Lelouch, but I liked it even though I don't care much for that pairing.
http://www.fanfiction.net/s/4609371/1/For_TwoI adore this one. As mentioned, though, it's het. (Lelouch/Kallen, if you're curious.) It's a little weird stylistically, but fuck, it very nearly made me cry.