
On the surface, Koudo Ikusei Senior High School is a utopia. The students enjoy an unparalleled amount of freedom, and it is ranked highly in Japan. However, the reality is less than ideal. Four classes, A through D, are ranked in order of merit, and only the top classes receive favorable treatment. Kiyotaka Ayanokouji is a student of Class D, where the school dumps its worst.

May 7, 2025 • 24m•U/A 16+
Ayanokoji joins a high school with a 100% success rate, but finds himself in Class D, full of problem students. The school provides ample monthly points, but Horikita suspects a hidden motive behind this system. They soon discover the school's true nature.

May 7, 2025 • 24m•U/A 16+
Class D is revealed to be the 'defective' class, losing their points due to poor behavior. Facing poverty and expulsion for failing grades, Horikita aims to rise to Class A, enlisting Ayanokoji's reluctant help for the upcoming midterm exam.

May 7, 2025 • 24m•U/A 16+
Class D surprisingly excels in the midterm exam due to Horikita's efforts and Ayanokoji's intervention, but Sudo is at risk of expulsion with a near-failing grade. Ayanokoji must act to overturn the results, witnessing Kushida's hidden side in the process.

May 7, 2025 • 24m•U/A 16+
Despite improved points, Class D faces a new crisis: Sudo is accused of assaulting Class C members, potentially costing them more points. Ayanokoji seeks Class B's help, suspecting Class C leader Ryuen is manipulating the situation, leading to a proxy war.

May 7, 2025 • 24m•U/A 16+
After a rough semester, summer vacation begins. Horikita avoids socializing, but Ayanokoji invites Class D to the pool, prompting her reluctant participation. Other class leaders appear and Class D boys begin a suspicious plan.

May 7, 2025 • 24m•U/A 16+
The vacation is a special exam: a week on an uninhabited island with limited points. Classes must occupy spots and identify leaders for points. Class A moves quickly, Class B enjoys the island. Class D is confused and disoriented.

May 7, 2025 • 24m•U/A 16+
Ibuki stole the key card. Horikita fights her, collapses, and is forced to retire by Ayanokoji. Class D faces disastrous results due to retirees and wasted points. Class A steadily collects points, then someone unexpected appears.