There are Many reviews Saying that this anime is not very good/ waste of time. I'm usually a fan of more action anime and I tend to steer away from others. I started to give this one a try when after it had released about 4 episodes. To my surprise it became my favorite anime for this summer.
The story's main protagonist giving them personality making them unique and wanting to keep watching to learn more solely about them.
The plot takes place in a school as describe in many comments Focused on the elite. It has the D class (Defective class) which is for the main purpose of the higher rated classes to pick on and make fun of.
The only thing that has me worried is that it ends up being just another 12 episode series.