Arseru
I don't think I can give a satisfying answer but I'll try. Well first of all with the way the story is progressing it doesn't look like a harem but with the scene where the twin princess mentioned about competing for Ren in the latest chapter well let's say it raised some kind of possibility about it having a harem, but that is up to you since you are the author but honestly if you ask me I would prefer it to not have a harem since from my point of view having a harem would mean the main character's attention would be divided and with that happening the whole story would be much more complicated so I recommend if the that you write it in a situation where the mc only focus on having single love interest but also focus on the other characters so that they wouldn't get left behind. Well, that's just my opinion tho since as you said different people have different opinions and sorry if I wrote something that's hard to understand please just overlook it since English is not my language and don't mind it too much anyway sorry I couldn't be of much help to be honest it kind surprised me when you ask me the question đ