Fics like The Substitute

Dean smells his mate one morning while getting his mail. He keeps smelling him in several different places, but never sees him. After months of smelling the mate scent without seeing his mate, Dean becomes cranky and begins to think he might go crazy. Then one day, the scent walks into his shop with a car repair, and Castiel is nothing like what Dean thought he would be. They hit it off easily despite Castiel’s traditional upbringing, but there is one barrier to their domestic bliss: Castiel is betrothed to another.

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