I don't have numbers or stats here (we have
ename144 for that), but I don't think
most of the scenes are BDSM. Some of the sex scenes take place outside the club's influence and aren't BDSM. Quite a lot of the sex scenes that are set up by MC's involvement in the club, but not within the club itself aren't BDSM either. If you can view the BDSM and kinky elements for their plot relevance without being disgusted that you had to see a girl restrained on a bdsm bench or locked in a cage or something, then I think you can enjoy the game. If you're looking for a vanilla harem game though, this ain't it.
It's excellent. Best AVN writing all time, imo. The GOATed HS artist is making the visuals. The story is intriguing with consideration to moral dilemmas that you don't often see in AVNs, and when they are, they're usually heavy-handed or insidiously preachy. Not here. It's all handled well. Give it a shot.