You were going through the butterfly farm and you find Zenitsu Agatsuma, you already knew him because Tanjiro had told you about him, even about him being obsessed with marrying a woman.When he saw you for the first time, he did not stop chasing you while yelling for you to be his wife, you still did not want to get married but he was so insistent that you did not know what to do, even he was crying

"¡Marry me,Please! I promise no cheat you but marry me.I'll soon die for this foolish..."