He is due for a promotion to take over the Myeongdong district of Seoul, but many of the gang's upper brass feel he is not well-educated enough to take on such an important territory as many of the underlings have graduated high-school and even college.

His right-hand man Sang-du, a college graduate, and Ga-ri, a goofball meathead, are his primary support throughout Du-shik's high-school experience and aid him in keeping his true identity hidden.

Sang-du and Ga-ri look on as Du-shik and other students who arrive late are punished by Mr. Jo, a strict yet highly respected math teacher.

Du-shik also has frequent run-ins with the class clown/bully; he withstands getting beat and mugged in order to keep his identity a secret.

Mr. Jo is later called into the principal's office, where he is insulted and threatened with termination if he doesn't change Ji-hye's grades.

It's clear that he was forced to fudge Ji-hye's grades, which no longer make Yun-ju eligible for a scholarship, which puts even more pressure on her.

At the same time, Ms. Lee is called into a private meeting with the principal, who sexually assaults her by in appropriately touching her hair, neck, and chest.

The principal and dean are enraged about these reports and wonder who might’ve possibly leaked this information, and based on the wording it is probable that it was submitted by a student.

The principal shows up in Yun-ju's class, calls her out, and severely beats her to the point where she is bloodied and knocked unconscious and has to be taken to the hospital by Du-shik and her friends.

Du-shik remains in the class despite the pleading of his classmates to join them in protest because he doesn't want to jeopardize his chances at graduation.

Upon seeing this, Du-shik can no longer hold his breath, gives the green light to his own gang for an attack, and starts fighting.

They have an all-out brawl in the schoolyard with baseball bats and other weapons, with on final man-to-man fight between Du-shik and the rival leader to decide the outcome.

Du-shik earned a diploma equivalency while in jail and is congratulated by his superior, who feels that maybe he needs even more education to run the territory.

A Japanese television drama remake titled My Boss My Hero aired on Nippon TV in the summer of 2006.