Looking for specific Dean/Alec NC-17 fic.

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Hey you guys, what's up? I'm looking for a specific Dean/Alec fic that is, well, basically PWP, lol. It's NC-17 and I don't remember a lot of specifics about it but I do remember some. I'm pretty sure that Dean thought he was dreaming during all of the sexy time, he was on bottom, Alec I think tied up his wrists and at first Dean was hesitant because he wasn't to keen on bondage because of hell. He warms up to the idea though and they of course make sweet inter dimensional twin love, lol. Dean proceeds to "wake up" and continues to think that it was just a really vivid dream until Alec shows up at the end. I think it ends with Dean shouting "CAS!" or something like that because he thinks that he's behind the whole thing.

You guys have any idea what this fic is? Thanks to everyone in advance! :D I appreciate any help.

Oh, and if you guys wanna rec your favorite Dean/Alec and or Dean/Sam/Alec NC-17 fics I'd love to read them. Nothing to terribly angsty though, I'm in more of a porny mood then an angsty one :P/