I started reading a fic several months ago that I have since lost and would love to find again.

I can't remember if they were on a case or it just happened by accident, but Sam and Dean get transported to some alternate universe where there is an alpha/beta/omega hierarchy. In this universe, they discover that Sam is an alpha and Dean is an omega. Through trial and error (usually Dean being stubborn and bold) they start to learn that omegas can't go out by themselves into society, and that everything is very segregated. Dean gets frustrated and ends up running away...Sam finds him, and that's where I stopped.

It did not start out as Wincest but it was getting there. Would love to continue reading this. Thanks for any help!