From the outside, Koudo Ikusei High School seems like a paradise, where children have complete freedom. But the reality is the opposite. There are four classes from A to D, and only the upper classes get all the socializing. Kiyotaka Ayanokouji is a student in Class D, where the school has thrown all the unsuccessful students.
There he meets the sweet Suzune Horikita, who wants to reach Class A at any cost, and everyone’s darling Kikyou Kushida, whose aim is to make friends with everyone. Here, the class ranking can change if the lower ones get good marks. And every trick in the book is used to get ahead in Class D. In this cutthroat school, will these children make it to the top?
