What kind of fucked story did I read? I don't even know who's side I'm on.

dont pick a side and just see how the story goes XD

Both of them have issues, but the kid is way scarier.

I agree. I mean, the guy didn't do anything wrong in the beginning. The girls get disappointed for who he really is. They think of him as a "Prince" just because of his face. So it's the "nee-san"'s fault if she cried, because she mistook him. The guy end up being nice when finally someone accept him as he is. The kid is a lot scarier and really mean.