A serious honor student Chizuru Shiina was shunned from the same grade due to his strong sense of justice, but he began to feel faint about Tsukino, the only teacher who was willing to take care of him. One day, she is told by the same teacher, Omura, that Tsukino is embezzling school money. Chizuru wanted to believe that she was something wrong, but Omura used Chizuru's feelings to demand her instead of stopping her mouth.