Ga-min is passionate about studying and puts all his efforts into it. However, he never received a good grade, which made him go to Yusung Technical High School. The school is known as a gangster training school, and unlike Ga-min, not many students are into studying. However, Ga-min wants to try a new method of studying, which is forming a study group. He asks his classmate Se-hyun to join him, but he tells Ga-min about a problem he has.

Ga-min gets into an unexpected fight against Hyeon U, a school bully. As the fight goes on, the two become the center of attention of everyone in school. At that moment, a man enters the classroom that has become a mess because of the two, and it turns out that he is a school inspector. The vice-principal who got furious about the incident decides to expel Ga-min from school.

Someone applied to the study group. Ga Min is excited to meet the applicant, but it turns out that it is Ji U, Hyeon U’s twin sister. Kyu Jin, a member of the student council, picks on Ji U, and Ga Min confronts him. Han Wul tells Hyeon U about Kyu Jin who was blackmailing Ji U. Meanwhile, Ranked 1 among the 1st years comes to see Ga Min.

Jun is impressed by Ga Min who defeated the rankers. He applies to join the study group and asks Ga Min to teach him how to fight. However, Ga Min rejects him because he only wants students who actually want to study in the study group. Jun decides to join the gang to become stronger, but it only gets him in trouble. Ga Min and his friends go to rescue him.