Koudo Ikusei Senior High School appears to be a perfect educational paradise, boasting immense freedom for its students and high rankings across Japan. Yet, the reality is far from perfect. The school sorts its students into four classes from A to D based on their merit, with only the higher-ranked classes enjoying the best benefits.
Within Class D, the lowest of them all, is Kiyotaka Ayanokouji, a student among those deemed the least capable. It’s here he encounters Suzune Horikita, who stubbornly believes her placement in Class D is a mistake and is determined to work her way up to Class A. Alongside them is Kikyou Kushida, a friendly class idol whose goal is to befriend everyone.
Though their class placement is fixed, their rankings are not, offering an opportunity for advancement. Class D offers no restrictions on the tactics used to climb up the ranks, setting the stage for fierce competition. Will Ayanokouji, Horikita, and Kushida manage to defy expectations and rise to the top in this ruthless academic environment?
[Adapted from MAL]