Millionaire Tanjiro x Hitman Zenitsu

Tanjiro is a wealthy business man, who took over the business after his father passed away for a long time.
But suddenly, he met a problem on his way, a man who is named Haruto Kobayashi, who tried to ruin the Kamado's business with rumours and lies, Tanjiro starts getting death threats by the man, threatening to hurt him and his family.

Tanjiro had no option to take this into his own hands, as he heard of a internet world-wide hitman named Zenitsu Agatsuma on the dark web located in fancy secret night-club, will he go?

(This is displayed in a Morden AU, none of the personality/reactions are cannon, but I tried my best.)