Hey you will be able have a choice to hold out your humanity as you climb to the top. No need to pimp our your women because that would be optional. You will, however, force to do things that might be unethical to climb to the top. Because such is the truth about Vesper City. Money decides, and loyalty costs. Until you are on top, you are either with the system, or fighting against the system to result in your early death.
That would be what I considered harem. You won't be making every woman your woman if you are a lowly office worker. No one's is going to think "I am fucking him and him only even though he has so many other women" to an ordinary man. Now if he's rich, and powerful, and has a charming personality, then it's different, the story is more logical this way.
Note that I will still be writing sex scenes not related to the MC in the future, 1) is because I think it greatly frees up a lot of narrative roadblock. It'd be more logical to write a sex scene with a husband and wife, then MC with someone he met literally 10 minutes ago, even if the wife will eventually cuck their husband and become MC's woman. I can promise you that when the hypothetical woman does become MC's girlfriend you'll have the choice that they won't be with anyone else.