Ibuki has stolen the key card, and Horikita's condition has deteriorated. Over Horikita's objections, Ayanokoji forces her to drop out.

With the panty thief incident already eroding Class D's trust, Horikita finds her leader key card stolen. While they try to figure out who did it, the base camp is thrown into chaos with a new incident of arson.

Class D has achieved a degree of unity in facing the special test, so Ayanokoji and Horikita head out to see how the other classes are getting along. Class B is working together to make a comfortable life for themselves, while Class A remains secretive.

As part of a special test, the school has brought the students to an uninhabited tropical island where they must now live for a week. Their performance on the test can have an enormous impact on the point standings of the four classes.

It's summer vacation! The first-years get to board a luxury cruise ship, where they're allowed to sample the highest class facilities available.

Even during summer vacation, lone wolf Horikita would rather remain locked in her room studying than interacting with others. One day, Ayanokoji invites her to visit the pool with some of the others.

Sakura's testimony has bought Class D time, but Horikita and Ayanokoji still need to find a way to tilt things in their favor. Meanwhile, Sakura senses the presence of a strange man nearby.

With the hearing for the assault approaching, Ayanokoji and Kushida attempt to secure the cooperation of Sakura Airi, possibly the only person who can testify that Sudo was acting in self defense.

Sudo has been accused of fighting with a student from Class C, and depending on an upcoming ruling, Class D might have its few remaining points stripped away.

Thanks to a lot of hard work and scheming, Class D managed to get surprisingly high scores on their midterm exam. But when a student fails a single test, Ayanokoji makes one final play to save his classmate from expulsion.

With their first midterm exam approaching, Class D needs to find a way to improve their class average, or face another month with no points to spend. Even Horikita decides to take part, forming a study group to help the class underachievers. But can the stanoffish Horikita really inspire her classmates to succeed?

Melancholy, unmotivated Ayanokoji Kiyotaka attends his first day at Tokyo Metropoiltan Advanced Nuturing High School, a government-run institution where everything is decided based on merit, including the students' generous monthly allowances.