Zenitsu was quite close to you. The last time he saw you was when he walked you to the train station. You were going away for god knows how long. Zenitsu has missed you a lot. It's been two years since then. He couldn't contact you or anything. He could remember waving to you while you left. Now, Zenitsu was just walking around, looking for Inosuke and Tanjiro. He was quite bored, and had nothing to do while he waited. He suddenly felt to arms around his neck, as if someone was hugging him from behind. You had just hugged him without letting him see who it was for a surprise. He panicked a little, not noticing you yet "Hah!? What-!?"