Hmm... None of the tags for this VN mentioned BSDM. I can tolerate some spanking it it's in the character of one of the girls, but it literally every girl get's "turned on" by being humiliated and spanked, then it's a bit too overboard with me.
I'm confident that won't be happening. The MC is mostly just assertive, but some of the girls each have their own quirks and kinks. The first girl, for instance, doesn't seem to have any BDSM-related kinks at all, she's just way into the MC for several reasonable reasons. He likes to be in control during sex, but he also demonstrates in the game already that he will
immediately back down the moment she says 'No'.
The dominance aspects of this game appear to be aimed more toward the
D/S (dominance/submission) side of BDSM. There's some
very mild discipline toward one of the girls but it's extremely mild, and the extent of the masochism seems to be a girl who enjoys some rough spanking rather than actual overt pain.
I get the feeling this VN is going to be centered around the BSDM theme
It's not. Each girl has a primary kink shown in the code. It's fully to be expected that not all encounters with each girl will specifically include that kink every time, and there's no reason whatsoever for the MC to subject a girl to a kink she doesn't like, because she won't enjoy it, and thus the MC won't enjoy it, either. So for example, if one girl likes bondage, there's no reason to humiliate her, so the MC wouldn't. Similarly, if another girl likes humiliation, there's no reason to tie her up, so the MC wouldn't.
But the moment caring turns into possession and punishment it looses the positive vibe for me.
There doesn't seem to be any indication that that's ever going to happen, with the MC's attitude and personality.