This is a typical harem, to start, except for the MC. Arata is totally awesome because he's finally plausible as a guy with 5+ women chasing after him. He's a total horn dog. That's the only reason I kept up with this after Ep 3.
That said, this tapers off. The first half of the series is a hornball MC with a harem and slight whiff of plot. The end of the series is the inverse. I wish they'd have picked one or the other.
Arata and Levi are the best characters. Everyone else is rather one dimensional.