if as harem you consider "every girl has to be mine" then, nope, this is not harem game most probably.
yet, if as harem game you consider a few possible combos including 2 or more girls, then this game is a harem game.
anyway, unless we are talking about 12-15yo players, usually is a bit boring playing full harem games, particularly if every girl is served on the silver plate, just waiting for the mc to decide....though we shall see how those things will be here, hopefully (based on the first few episodes) not in that manner.