There's three so far, but its been concentrated fucking win for all three.
There's no "harem" aspect yet, and I somewhat doubt there will be. Though the redhead from the OP has yet to be introduced officially, I don't see her being much of a viable romantic rival (Haruka's name IS in the title, that sorta makes the eventual outcome rather foreordained, after all). And it does a good job of avoiding the usual cliches.
Yuuto mans up on a regular basis as well.