Saikyou ni Uzai Kanojo no, Ashita Kara Tsukaeru Mount Lesson

A school enforces a rigid social hierarchy known as "The Pyramid," determining students' status and treatment. Sato Rei, a typical student, is trapped at the bottom, facing constant harassment from wealthier peers. Advancement to the top tier, S class, is the only way to escape this fate. A mysterious and attractive girl, Chisato Tsukinami, unexpectedly approaches him, kisses him, and proposes a partnership. She claims that by becoming her boyfriend, they can rise to the top of the school's hierarchy. Rei is left questioning how this will work. The story centers on their collaboration as they attempt to climb the ranks of the school's strict social order.