Not every game needs to have a harem component. This one with it being in a work setting and more of a realish life vibe to it in the demo, doesn't feel right to have a harem.
I don't see the appeal of harems to be honest, as the games tend to get repetitive with them incorporated. It also eliminates any tension between the LIs and takes away from character development in my opinion.
I'm the opposite of you, for me games without harem are boring, first you are forced to replay the same game with little difference between the routes just because of 1 or 2 LI if you want to see all the content and that is boring to do, just gives the illusion of the game being longer than it actually is, we players waste unnecessary time skipping previously played scenes, more development and waiting times, the game gets repetitive too and if devs are already doing half assed harem why not just make a complete harem route since it will not have that much diference and they lose more than they gain with the half assed harems.
But of course everyone has their own opinion and devs do whatever they want to do but yeah they lose more doing 3 half assed route than doing 2or 3 half assed routes +1 full harem route .
For example for me to play a game 2 things are mandatory, no NTR/swinging/sharing crap and need to have harem route, my time is limited so can't waste time skipping content that i already had see just for a couple new scenes . A good harem game don't lose character development unless the dev don't put any effort to it and since I don't need to repeat the same game 2,3 or more times the games turn more enjoyable and less repetitive.
Anyway gl for the dev with the game, maybe next one if gets full harem will give a chance to it.