We are exploring harem ending options, if people were to seek combinations of LIs out as part of their gameplay

Watch this space. But it isn't inherently a 'harem game' as a genre.
To make it simpler and uncomplicated.
1. Harem = ALL LIs
(Personally I would love an ending with all of them, plus the MC is going to be a Duke, the question would be why not have a Harem? Since he has money, a huge property and the most important thing is fiction, a way to get away from reality and immerse yourself in a different world and represent something different from what it is like to live in reality)
2. Combination of girls be it 2, 3 or 4 is a harem according to the tag system of F95, but for connoisseurs or more experienced players that is a semi-harem, so if you do it like that, you can use the Harem tag, but I recommend that in the Genre: section you put it as semi-harem and in the Developer Notes you clarify it, this way it can be avoided. (Personally, the semi-harem or multiple endings is the option that I like the least, several people, including me, leave aside or avoid good games or games with potential for that reason)
3. I recommend, why not do all the options? That is, manage the game as a Harem where one route or one Li is not excluded, for another (unless the player wants it) and at the end give the options of:
- LI only
- Threesome or Trio
- semi-harem (combination of LIs 3 or 4)
- Harem (highly recommended, lol)
Without further ado, greetings and good luck DEV
CovertApe