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Human AU. Dean Winchester teaches a third-grade class. He's new to this whole ‘bisexual’ thing - but by pure happenstance, he meets Castiel: a particularly dapper male librarian who moonlights as a substitute teacher. Dean's curious and Castiel is willing, so why the hell not?
Except, fate never intended it to be one-time-only...
(with art by valiantparadox)