Fics like Patron Saint of Naivete and Loyalty

Chuck knew it sounded crazy. Well, schizophrenic delusional, if he was completely honest about it, but he knew, he KNEW, the nigh-unbelievable secret Casey had been keeping from every single person he encountered. Major John Casey was not human. He was, in truth, an... Incubus. (In which Chuck figures out a huge secret, confronts Casey because he's Chuck and a loyal moron, accidentally propositions him, and... Ahem... Helps... His incubus friend.)

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