I've been reading this, with many interruptions, for the last...oh, 16 hours, and now I am yawning and blinky. Heh.
Good lord. For one thing ...90,000 words? Seriously? Seriously?. And. I mean. 90,000 words that I kept reading. I am pleased with myself for (er. I dunwanna spoiler other people before they have a chance to read, so whiteout it is...) *being sure when Draco initially mentioned that he'd been there unconscious, that it was relevant, but I didn't figure out really where that was going until late in the game. I was sure there was a Horcrux, and contemplated whether it could be the mostly-blank journal, but decided that was too obvious (and laughed at myself for ever, in any fic with this title, thinking that, but still). I love the little portrait (I mean, I love that it's a physically small portrait that winds up having all this... well, I guess Harry says, power of intimidation and fascination and such).
There was a lot of smut, a lot, but it didn't seem unreasonable that there would be, that they would be such, uh, active boys and all. Also, I liked that Harry wrote in his journal and gave it back, voluntarily, both because it was voluntary balancing out for his own getting into Snape's business, and because I always like when people make adult Harry smart/thoughtful.
Minute nitpick for when you repost this elsewhere: unless I read it wrong, the first time Harry writes in the journal at the window, it says there's no moon, so he calls up a Nox; I think you meant Lumos. ;)*
Anyway. This was great, and Cel is lucky, lucky, lucky.