Summary
On her first day of school, young Narcissa Black asks her father what would happen if she didn't get sorted into Slytherin. His response was to simply remind her of all the Blacks who had been in Slytherin. Clearly this meant she would be in the same House. But what if she wasn't? What if she made friends with a Mudblood? May eventually become Narcissa/Lucius, but they're young.