Prologue

Castiel, with all his memories of being human, falling, and all that jazz, wakes up to find Sam and Dean looking down at him.

He almost replies with a casual "Hello," when he suddenly feels cold handcuffs against his wrists. Dean, the man Castiel knows to be quite kinky, leans closer to the blushing Castiel and catches the ex-angel off guard by yelling,
"WHO THE HELL ARE YOU??"
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(In which Castiel wakes up in an AU where Sam and Dean and everyone has no idea who the hell he is but Castiel knows who the hell they are.)

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Story requested from an unknown user