Perhaps there should be a tag of "Not a harem game". Might solve some issues around the NTR tag around here
The problem there is peoples expectations not the tag itself.
The tag is right, there is a group of people fucking in one place which warrants a harem, the problem with some people is the MC isn't the focus of it.
Unlike typical harem games where the girls fall head over heels for the MC and wants no one else, here they carry on doing what they want.
They all still have their own things going on which is shown best at the end of the game.
You only get to pick 1 to stay with. The rest either move on or have something else they need to do.
The Succubus leaves completely. She doesn't settle down at all, which should be obvious given what she is.