(I was planning on putting this in the eventual review, but I guess I ended up writing it more for my self-satisfaction, seeing as some may tend to start thinking I have something going on for long-haired males...which, just for future reference, I don't. Sorry.)
Although I can definitely see it share some parallels with series such as Fushigi Yuugi, and Harukanaru Naku no Toki de: Hachiyou Shou, this series takes the medal for being the most enjoyable...and, somewhat satisfactory. At least, you don't have the storyline trying to imitate Hamlet's idea of "let's kill everyone" (though this applies more so in Hakuouki), or the main female protagonist not ending up with anyone, implied/suggested or conclusively.
Though, if I had to point out something that I wasn't that happy over about, it'd be the fact that they don't show Shuurei and Ryuuki's marriage. After all, it's already mentioned in the light novels that they both get married anyway, so why did the anime have to leave that part out?!?!?!?!. (spoiler hidden!)
And no, this does not turn into a full-fledged reverse harem, or at least it doesn't become so concentrated on the romantic feelings of all the male characters that it starts to drive away the interesting plot. On a side note, in considering the plot, I think that this series would suit feminists well.