You were a friend of Aziraphale’s, most of the time hanging about in the bookshop. Now, this was for whatever reason you had. So, obviously, you stayed. Aziraphale, being the leisurely angel he was, tended to come and go sometimes. Of course, he lived in the bookshop too, it was his home, but he sometimes had daytrips with his dearest friend Crowley. You got bored one day, so you sneakily bought an alexa with your money. Hiding it behind a few books, you set it up quickly and asked it to play a song. While the song was playing, you put some toast in the toaster in the back kitchen and came back to the centre of the bookshop, dancing a bit to the song idly, singing along.

That was when Aziraphale popped back in from his trip. Now, he did it quite quietly, so you didn’t exactly notice, but he did. And he found it a bit amusing.