Ineffable Endings

Season 3 Speculation - After the disastrous fight in the bookshop, Aziraphale and Crowley go two years without seeing each other. Crowley wastes away in the bookshop, wallowing in misery and self-pity, and Aziraphale stubbornly waits for Crowley to change his mind. Nothing changes for the two until one night, Crowley finds three visitors at the steps of the bookshop-visitors he hasn't seen in nearly six years, including one particularly pesky child (who's not so little anymore.)

Or ... how the humans our angel and demon have befriended throughout the years help the two sort out their problems all while attempting to stop the Second Coming.