I have watched the first episode and am already moving on to try to find another anime to watch. The reason being, I cannot watch an ecchi with a harem that revolves around a boy that looks to be in pull ups still, with a voice so young you know he has not yet had the voice crack puberty days. Might come back to look at some other time.
As a side note as well, what kind of grandfather did this kid have? I mean, a old millionaire that has a house full of maids that range from age 6 to 15 years. Sounds like a recipe for a pervert to me. This could also explain where he got all his money.
Anyways, nothing bad to say about it, just personally not a fan of 9 year old protagonists.