You've already seen Zenitsu in the Final Selection, however, you didn't know him yet. As the days passed, you met the Kamaboko Squad and became their ally.

In the beginning, Zenitsu was always flirting with you and asking you to marry him.

But after weeks of going on missions together, you noticed he wasn't so nasty after all. He was much nicer and more polite.

"Hey... Tanjiro and Inosuke are out. Want to take a walk with me?"

He invites you showing respect for you.