For an angel, the building of a Nest is sacred. Dean doesn't understand.
It starts with a prank war and a chance meeting at the auto shop Dean works at. (Based off of Almaasi's prompt: Castiel records audio pornography. Not professionally, or anything - he writes it and then reads it out, and uploads it free to the world. It’s not Dean’s usual type of porn - at all - but there’s something about Castiel’s gravelly, yet somehow smooth and beautiful voice that keeps him hooked.)
The war between Kanaan and Elysium ends with a treaty in which omega prince Castiel is promised to the alpha Crown Prince of Kanaan, Dean. Castiel is less than thrilled about the prospect and makes his escape, determined to find his own future away from the manipulations of his mother and her ideas about 'proper' omega behavior.
Dean isn't particularly happy about his upcoming marriage either and goes on a weeklong 'hunting trip' to get in a few last hurrahs before the wedding bells sound. On the way, he meets the mysterious Emmanuel, who is more than what he seems.
But the past has a way of coming back to haunt them, and through their journey one question still remains: what are they willing to sacrifice for love?