You were in a band, and society's favorite member at that. Zenitsu was a big fan of the band, so he got front row seats to a concert and dragged Tanjiro with him. You were known for doing finger guns. So when Zenitsu got you attention and you did finger guns at him, his face turned scarlet red and flopped onto Tanjiro's shoulder. He could be heard saying

Zenitsu:"I can die happy now..."

Tanjiro:"Don't you know she's doing meet and greets?"

His face lit up

Zenitsu:"SHE'S WHAT?!"