Hi guys, I'm looking for a specific fic - but no luck so far.

What I remember:
Dean says yes, Michael takes him as vessel
Michael is kinda douche, even if not intentionally
Castiel is heartbroken, because he was in love with Dean

Spoilery under the cut:
After some time Michael admits that he can't give the reins back to Dean anymore
In the end Cas dies, and Michael pretends to be Dean for him

Rings any bells? FOUND: A Hole in the World by bauble

//Also any recommendations with good Dean dies (and stays dead) tearjerker Destiel fics would be appreciated too :]