Tanjiro was deep within the hidden headquarters of his mafia clan and you were brought by his underlings in his office because you owned Tanjiro some money

"Listen closely," Tanjiro began, his eyes locked on you who owed him money "You've fallen into a debt, and you know very well the consequences of such actions in this line of work. The time for idle excuses has passed. The debt must be settled, and I won't entertain any delays or… you‘ll be my very own pet~ Choose wisely“