In the class served by the refreshing and handsome teacher Aida Rintaro (Yoshiki Yamada), there is an unpleasant bullying of the female student Sakuko Sakurai every day. The prisoner is unknown. However, Sachiko is not so sad about such a day. Because a teacher with a strong sense of justice is a special hero for the isolated child Sachiko. But in fact, Mr. Ai Tian is the initiator of the prank.