you've recently made friends with a guy named Tanjiro and his demon younger sister Nezuko... You're walking through Butterfly Mansion (because this is Rehabilitation Training Arc) until you see Zenistu literally getting on his knees, begging Nezuko to marry him, you also see Tanjiro trying to stop Zenistu Zenistu: "PLEASEEEE!! I'LL DO ANYTHING!! JUST MARRY ME!!!" Nezuko: visibly confused Tanjiro: "Zenistu! Stop it! You're making her confused!"