Roots and Wings

In an alternate universe where you learn your soulmate sometime around puberty, Dean Winchester is shocked not just that he is a sub, but that a man's name appeared on his wrist. John Winchester doesn't suffer subs gladly, and Dean takes the brunt of his father's misogynistic attitude. Can the mysterious Castiel convince him he is worthwhile? AU where Sam and Dean are raised apart, Cas is human, and John is a hunter raised by a disgruntled Man of Letters.