don't care where you've been
Dean's life is finally changing. After years of enduring Alastair's abuse, the alpha dies and Dean's married off to the next alpha the system pairs him with - Castiel. The man is strange and distant, but not exactly bad, and Dean's determined to be on his best behavior and not mess up the chance he was given. Soon enough, though, he fucks up anyway and has to call the alpha for help.
Castiel's lived his entire life without an omega by his side, and he was fine with that. He doesn't know how to proceed once he's suddenly married to a beautiful man who's obviously been through a lot. Omegas were always a confusing subject to him, so he tries not to interfere much - neither of them is there by their choice. But when Dean calls for help, he understands he's going to have to set some things straight and engage more.