Hello to you ecchi lovers, this is the anime for you. Although this has a questionable plot, which was made specifically made for ecchi, it's pretty good. Basically, the story has a somewhat cliche line (by ecchi standards). There's the boy who lives by himself, then happens to stumble upon a beautiful girl who then moves in with him. From there I think you guys know where this is going.
Over all i give this series a 8/10, a little predictable, with a cliff hanger ending. But if you liked Chobits, you'll like this anime. Some good humor, without pushing the ecchiness.