"Classroom of the Elite" is set in Koudo Ikusei Senior High School, an elite institution renowned for its state-of-the-art facilities and near-perfect graduation rates. The school employs a unique class system, dividing students into four classes (A through D) based on their academic and social performance. Class A enjoys the highest privileges, while Class D, where the protagonist Kiyotaka Ayanokouji is placed, is considered the lowest tier, often dismissed as a dumping ground for misfits and underachievers.

Kiyotaka Ayanokouji is an enigmatic and reserved student who initially appears unremarkable but harbors a sharp intellect and a mysterious past. He forms tentative connections with his classmates, including Suzune Horikita, a fiercely independent and academically gifted student who initially isolates herself, and Kikyou Kushida, a popular and outwardly friendly girl with a hidden manipulative streak. The narrative unfolds as the students navigate the school's rigorous and often cutthroat environment, where their actions and decisions directly impact their class rankings and privileges.

The school administers periodic special exams that test not only academic prowess but also teamwork, strategy, and psychological resilience. These exams often pit classes against one another, forcing students to confront their weaknesses and form alliances. Kiyotaka, despite his outward indifference, begins to subtly influence events, using his strategic mind to manipulate outcomes in favor of Class D. His actions reveal a deeper understanding of human behavior and a willingness to exploit others to achieve his goals, all while maintaining a facade of mediocrity.

As the story progresses, the dynamics within Class D evolve, with students gradually recognizing the importance of collaboration and trust. Suzune emerges as a natural leader, striving to elevate the class's standing, while Kikyou's dual nature creates tension and mistrust among her peers. Kiyotaka's calculated interventions often serve as the catalyst for pivotal moments, though his true motivations remain ambiguous.

The series explores themes of meritocracy, social hierarchy, and the ethical implications of manipulation and ambition. It delves into the psychological pressures faced by students in a hyper-competitive environment, highlighting the lengths to which individuals will go to secure their futures. The narrative maintains a steady pace, balancing moments of tension with character development and strategic maneuvering, offering a thought-provoking examination of human nature and societal structures.