For starters, the characters in this game are VERY LOOSE with their sexual activity, everyone is a slut of some kind, and they enjoy it! Since entering the pornographic video game world, I've realized that this certain N word seems to spark controversy. To be honest, I'm still a bit fuzzy on what it is, exactly (Even after making a few works about it...  I think). From my understanding, it's witnessing a sexual activity that involves a partner/love interest/relation cheating, while the loved one is unaware of it. Or is that cuckolding? Or is THAT when the partners in the room? Correct me if I'm wrong.
There are light elements of this at the start, but it's certainly not the main focus. Voyeurism certainly is, and it's one of the ways the MC learns about how LOOSE everyone really is.
Why is everyone so loose? I'm hoping to explain that as the adventure goes on. (Maybe it's something to do with that succubus that keeps bothering you.) And as the adventure goes on, the MC will have a chance to put a stop to some of it, and make honest women out of some of the characters (kind of.)

Thanks for reading, hope that clears some things up, and please ask any other questions you may have.