The angels have fallen. Castiel lost his grace, and is now a human. He experiences hunger, cold, need, but still pondered at the thought of love. Dean takes him under his wing and helps him understand his new way of life; every aspect. Even though his grace is lost, the affair between a man and an angel is forbidden. Not to mention, an angel and a Winchester. In addition to the internal conflicts between the two, they also have to worry about the bounty put on Castiel's head by the other fallen angels.

Dean discovers that his angel, Castiel, has a very interesting weakness. After triggering this weakness, Castiel must learn to contain it, for Dean's sake, and to keep things from getting awkward. The thing is, though, he can't help it. Warning: Swearing, Boy x Boy, Smut (Imeanwut?), etc.