"This place is just a trading house. You pay us, and we fulfill your request. We're similar to those so-called transmigration bureaus and time-space administration offices. Some people call us pawnshops, too. When all is said and done, we're just a trading house. We serve people who died carrying grievances, hatred, and powerful obsessions. We can grant any wish you have. Do you want to make a deal?"
Trading houses: No one knows how many there are. Each one has a manager wrapped in a white robe, their appearance impossible to make out. Every manager has several employees working under them. Once an employee has successfully completed commissions for clients in fifty worlds, they are promoted to manager.
Above all the trading houses is a mysterious boss whom no one has ever seen. The payment from every deal is sealed away and sent to the boss.
Our protagonist is one of these employees, still working hard as he makes his way through his assignments.