Man what a shitty story, although it was quite interesting for a while, especially the way she tried to help him.
On the other hand, the way she views their relationship at the beginning, doesnt make their physical interaction comprehensable. It feels more like embedding adult content in a story in which it doesn't really fit.
They reveal the background storys of most characters close to the end and they really suck. The stroys are plain and unrealistic and they make the characters more and more unlikeable. The way he solved her problem at the end is also very simply and uninspired.
I have never seen so many despicable characters in a romance manga.