@wilddeath It's amazing that so many of them happen to be concentrated in this school though. I think over the top bullying just happens to be an anime-manga trope.
The main guy seems to be just a complete prick, but the story hinted that the girl may have had some motivation, but it was never explained.
The story is obviously focused on bullying, and toward the end, it was focused on the fact that revenge by bullying the bully is not okay, yet in trying to help the readers find sympathy for the girl, the story completely overlooked why she had changed, or why she was a bully in the first place. I just found it to be poor story telling.