Cas isn't an angel. He is Dean's husband and a hunter like Dean. In one of their hunt Cas got shot Von a gun and dies. Dean feels completly Lost and desperately goes at the kreuz road to make a deal with the demon.
castiel/dean. (future!cas/present!dean, future!cas/future!dean, present!cas/present!dean.) "why'd Du have to wait to find me?" focusing on (future) castiel and his feelings toward dean.
Explores the beautiful, strange and tension-fraught relationship forged between Dean Winchester and Castiel, who have blazed a trail to each other's souls while having to cope with their own struggles - and each other.