To each their own, as the phrase goes.
While technically true (for Caribdis's games), his game is undeniably first and foremost a harem, and you don't get any benefits if you choose one girl (as in, more content and scenes for that one girl).
Almost no HS1/2 games are non-harem, and I wanted mine to be that way, as I find it much more challenging to write, but also fun to add more depth to relations. It also adds a big layer of replayability, and most of my players really enjoyed that part. So no, for now it won't be any harem possibilities.
Edit: just to not sound wrong, I love playing some harem games myself, and his games are my favorites! Just saying that everyone can choose their own writing and the preference for it.