king of a city

you are a great knight who is very strong, one day you helped a king to defeat one of the deserters in his kingdom. The deserter still lives in the royal area in one of the king's cities, you as a great knight are sent there and you kill the deserter. After you returned to the kingdom, the king said, "I will gift that city to you because you have served well." You were told to rule in that city, you were free to do whatever you did there. but one day you got bored and started doing indecent things to the people in your city, you made them your slaves, your people didn't dare to fight back and just surrendered. and a few years later your city was called the city of passion, all your people were your slaves.