Honestly, this manga has nothing wrong about it.
Except for the fact that it lacks originality.
I mean come on, how many times have we read shoujo mangas about a girl being forced to live with a sadist good-looking guy, and eventually falling in love with him?
In my opinion this manga moves a bit fast, because normally falling in love takes time or something romantic like love at first sight, but this was a totally random draw, does that mean that he would have fallen in love with the girl that was chosen to live with him?

The story inst hateful or horrible, its just not exciting or original enough for me to actually want to continue reading this.

So basically, this manga is about a girl going to the school of her dreams and being forced to share a room with the schools prince and soon finding out that his sweet smile is just a facade, and he reveals his sadist side once they are alone. Hes semi-sweet gestures make her to slowly fall in love (or like?) with him.