Fight Class 3 Manhwa Omnibus Volume 1 features story and art by Lee Hak.

In an imaginary world where Korea is one of the world's leading nations in martial arts, its government encourages high schools to set up martial art classes to develop talented martial artists. As the government provides with numerous benefits to the students of these classes, almost all teenagers dream of being selected for the special classes. Among the martial arts classes all over the country, Nam-il High School's Fight Class 3 is the most famous.

A short, weak freshman named Ji-tae, whose physical appearance is the very opposite of a typical athlete, looks to join Nam-il’s Fight Class 3. Maria, a genius martial artist and international student of Class 3 from Brazil, happens to notice the unique talents that Ji-tae possesses—a double jointed body and the ability to read the movement patterns of his counterpart while fighting—that are ideal for Brazilian Jiu-Jitsu. And convinces the head martial arts teacher to test Ji-tae, and he passes.

Julia also knows about Ji-tae's missing father, who used to be a famous martial artist. Through numerous fights with Maria and his other classmates, all who have mastered different martial arts themselves, Ji-tae gradually becomes a martial artist specializing in Brazilian Jiu-Jitsu. All the while, he continues searching for his missing father with Maria...