Junko, a new teacher, was working hard in her classes to improve her students' grades. One day, her student Mita was suspended. Thanks to Junko's efforts, the other students' grades improved, but Mita, who had fallen behind in class, was different. The teachers who supported the chairman of the board of directors were worried that Ito, the son of the chairman of the board of directors, would be removed from the recommended quota, so they hatched a plan to frame Junko.