The setting is Advanced Nurturing High School. It is a unique educational institution that boasts high success rates for both higher education and employment, with future career paths almost guaranteed upon graduation. Students gathered from all over the country are assigned to four classes, A through D, with each class assigned a rank and evaluation. The school employs its own point system; points have the same value as cash, allowing students to use them for almost all necessary services within the school, such as food, shopping, and entertainment.

However, not all students can lead their school lives under the same conditions. The points given each month fluctuate greatly depending on the class evaluation, and the rank of the class directly affects the students' living environment. Furthermore, the school conducts "Special Exams" that test various abilities such as academic performance, physical ability, judgment, cooperativeness, and negotiation skills, in addition to regular classes and periodic exams. The content and rules of Special Exams vary each time, and class points and rankings fluctuate based on the results.

Therefore, while they are comrades in the same class, students cannot simply cooperate at all times. There are cases where the interests of the entire class and the interests of the individual align, and cases where they conflict. While in a competitive relationship with students from other classes, temporary cooperation or negotiation may be necessary depending on the content of the exam. Elements other than academic ability, such as information, trust, bargaining chips, and individual skills, also hold significant meaning.