Coming from a high school where grades are paramount, nothing is prohibited in this high school. The teacher is the judge. However, everything must be judged by grades. Only with good grades can you do anything, and grades can be exchanged for anything. How should the teacher manage the class? Every teacher has a mole! ! ! The mole informed the teacher about bad things happening in the class and the teacher went to judge! The protagonist is the boss of the class, and he wants to find out the ghost of the class! ! !