So many people seem to be confused about what this game is, as opposed to what they wish it would be.
For LIs being locked to Inei or Ren, keep in mind that these are two separate people with entirely different personalities who happen to share the same body. While Ren's character might be attractive to an LI, Inei's might be a turn off. The LI's have their own personality and
agency - they are not player-sexual. That's a good thing!
As for sex scenes, keep in mind that this is not a porn game. It's a visual novel, with emphasis on
novel. Even with NSFW enabled, there are only soft-core sex scenes and only when the plot calls for it.
If you are looking a for a generic anime harem to jerk off to, this isn't it