even if he isn’t directly working on banging the other chicks (like his little sister for instance) I still think this loosely qualifies for harem status since it features the other female archetypes prominently even in a romantic light. I suppose that could be said about most anime or shows even…
it certainly isn’t Yumeria =)[/quote]
That’s his cousin who has the crush on Takeru, not his little sister, ugh. No one else shows any overt romantic interest in him at all. I’m going to tag the rest of this: In fact the other girls spend time back and forth helping the two who do like him. For there to be a harem, there have to be multiple people interested in one person. All there is here is a triangle, and it’s more like a right angle because Takeru never even notices his cousin. They bring in a bunch of the usual plot elements and mix them around - the robot, the aliens really being very old, and so forth. There’s even some big brother complex with the other main character (Takeru’s bud) and his sister, but not because she’s in love with her big brother so much as they’re super close because their parents died and she has no one else. Yes, that one is his sister. Maybe it’s time to watch this one again so you can post more informed comments about it. The cousin thing is pretty basic anime trope. I agree with the idea that it’s a fluffy mash of Gainaxiness, because in a way it’s all over the map without sticking to any particular genre. Everything from robots and aliens to slice-of-life going to school. And they throw in the requisite beach episode and festival episode along the way.
For some more help on tropes: http://tvtropes.org/pmwiki/pmwiki.php/Main/AnimeTropes?from=Main.AnimeTrope
Yumeria is by definition harem, as is Maburaho, in both the main character has multiple girls who all are in love with him.