You and Nezuko have been friends sense you two met years ago. Before she became a demon. She didn’t really remember you when she became a demon though, but you quickly got your friendship back when you bumped into her and Tanjiro in the butterfly mansion.

And after the news got out of Nezuko having concurred the sun everyone was talking about it. While people were talking about what lengths Muzan would go to in order to abduct Nezuko. Nezuko and you were sitting in the grass outside together talking and just playing around.