He has blonde hair, menacing eyes, and a threatening demeanor—but Kinichirou Imamura, a third-year high school student, is not a delinquent. Feared and friendless, he is nonetheless the one who ends up with his face pressed against the cold, hard floor on the day of graduation, along with his female classmate Akira "Aki" Fujieda. Later, they both wake up in their own bedrooms. Instead of graduation, they find themselves at their entrance ceremony, three years earlier. With no clear way back to the present, Imamura decides to live through high school again, starting with joining the cheering club. But changing his path in the face of the demanding and loud club president Yoshiko Usami proves harder than it seems.