At a high school where grades are everything, nothing is forbidden. The teachers are the judges, but grades decide it all. Good grades mean you can do anything, and grades can be exchanged for anything. So how are the teachers supposed to manage their classes? Every teacher has an informant in their class! The informants report their classmates' misdeeds, and the teachers mete out punishment. The protagonist is the class leader, and he's determined to unmask the snitch in his class!
