Game is enjoyable because there are some good characters, both main cast and support, and the voiceacting is great.
But in terms of plot, this game is a joke.
No villain has been really developed enough for us to care about. Out of 4 villains, 3 are lame (i completely share this opinion), and the last one is your generic evil emperor wannabe, only we see him so few times in the VN that i barely remember his name.
Plot during the heroine's routes is so rushed that it's almost embarassing.
Like people said before, it's as if after doing a decent work in the first 4 chapters, the developers were running out of funds or time...or both.
I honestly can't suggest people to buy this game unless it's heavily discounted.
A pity, because since it's enjoyable even if heavily flawed, it means that if the developers would have put more efforts this would have become an hell of a good VN.