With the start of the third term, Ayanokouji and his classmates, who have been promoted from Class D to Class C, head off for school camp. They will take part in a special test called "Mixed Training Camp," where all grades are combined. As the name implies, the test is divided by gender, and several groups are made up of mixed classes and graded based on a group basis. They have to cooperate with students from classes with whom they had been competing against each other as enemies to obtain a high score. Above all, they are horrified by the rule that students from groups that fail to reach the borderline will be expelled. The curtain on the turbulent third semester of the school year is about to rise!