Well, that title certainly grabbed my attention.
My advice? GO WRITE ANOTHER CHAPTER BEFORE I BREAK SOMETHING!
The way you write this story reminds me of Disgaea, actually. Love Daemon and Shiori, I'm gonna ship'em 'til you write the next chapter. :P

FIRST!
I've always wanted to say that, though I'm surprised there hasn't been one massive train of reviewers after seeing how many hits "she's my what now?" got in the first few hours.
Anyways, I'm betting that Sorata's the guy in the opening that wants his jerk back.
Oh, and since Shiori was able to rebuild the place in just five years, I'm gonna go ahead and have this random prediction that she'll use that skill again sometime later in the story. It's essential to the plot, I just know it.