Philip, a quiet and unassuming boy who is not good at making friends and would rather keep his distance, but possesses unrivaled intelligence. He never wanted to be called intelligent or extraordinary, he just wanted to live a normal life. By trying to escape from the person who created the extraordinary side of him, he ended up at the Advance Nurturing High School in Class D. Though the school appeared to be fairly simple on the outside but was far too complicated on the inside. Four classes A through D, are ranked in order of merit, and only the top class receive favorable treatment. Favorable treatment ranged from an outrageous amount of allowance, with no conditions on spending, to an unparalleled amount of freedom. The campus had everything, that anyone could ever desire, but only the top-scoring classes can fully utilize the school's offerings, and Class D is the furthest from such a status. Standing at the bottom of the hierarchy, Class D houses all of the school's "worst" students or better known as "Defectives". Philip wanted to live a peaceful life, but if he wanted to continue, he had to reach Class A. Follow the journey of Philip, and the rest of Class D, who must overcome their differences and clash against other classes in order to climb to the coveted position of Class A by any means necessary.