Word count: 1082
Author's Notes: Prequel to Castles in the Air by silverraven, who had a lovely idea and let me play in her sandbox. Missing... erm, well, scene... from 4.20, Last Man. This is for my Episode Tags and Missing Scenes square on cliche_bingo, since I don't have VR like silverraven does.
Sandcastles on AO3
There's so much more of this in my head. I plan to come back to it, but god - I have so many other things I must write right now! Perhaps you all could convince silverraven to write more?