Is this a Harem AVN or is it AVN that you had to choose one of the love interest?
I'd say it's shapping up to be the latter i.e. AVN where you choose one love interest. There will be different endings per love interest and you can stop pursing a love interest for some different types on endings but it's not a harem. Just a side note I don't have anything against harem games, and I've actually considered this a lot for this game, but I came to the conclusion that with its theming it just didn't make sense for it to be a harem.