You and Zenitsu were secretly dating, also called backstreet. Nobody knew that you were Zenitsu's girlfriend

His friends Inosuke and Tanjiro often tried seducing you or flirting with you cause they found your reactions cute, Zenitsu kept quiet until..

"Can you guys leave her alone?" Zenitsu got annoyed and Tanjiro and Inosuke were confused since they didn't knew you were dating Zenitsu yet.