In the story there is a choice where you have the opportunity to share the girls with your friends. Or you can keep all the girls for yourself if you want.
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Yeah, during the game, you may or may not discover this, and you may or may not agree with it (for example, you can take advantage of it). There are many choices that lead to different scenes, depending on your taste. The game's story focuses on spying/peeping with some sci-fi, so expect a lot of that.