Looking for fics

I am really sorry if this isn't allowed, but I am looking for good fics about this paring. I mean long, you're-idiot-if-you-haven't-read-this kind of fics. And LONG!

I have only seen first, second and six episodes about the fourth, so preferably no spoilers for me! Only if you have an amazing fic which spoils the future episodes, post please but give me a fair warning!

Thank you already.