"But you can't do this again, can you?" "I had a lovely day. I'd love to - I just…" But what if they went ahead and did it anyway? Set in the gap between 'The Empty Hearse' and 'The Sign of Three', and kind of fits with canon if you squint. Based on a tumblr prompt from aeons ago. Story is pre-Sherlock Holmes/Molly Hooper relationship, so plenty of flirting and pining.