In this school there is a class where students with the lowest grades are sent, it is called the "isolated class". Akari, an ordinary female student, falls into a segregated class due to her friend's betrayal, where she is exposed to irrational violence! However, she stands up to the members who dominate the class with an unyielding heart. At the same time, Akari joins forces with the mysterious Yuto, who has fallen into the segregated class, and vows to climb out of this mess...