Happy to hear that you enjoyed it so far, thank you very much! You skipped sex scenes, that's a first one for sure! :D
Lemme ask your questions:
1. When you talk with Naomi later and she doesn't mention anything, then it was actually just a dream. (Not sure if you dislike spoilers, so let's keep it at that)
2. You'll be able to choose whoever you want in your final harem. Not sure how much branching this will require in the end, but if you lose one path with a girl, they're out. It is a basically harem by choice. Actual dating with LI depends on their personality, some chars totally want to go on dates while others might not be interested in those things and more into actual using time for... things.
Hope that answers your questions! :)