Ai High is a school for delinquents, High profile delinquents. Normal schools teach their students how to learn, while Ai High teach their students how to survive.
This school isn't just an ordinary school,a lot of people tried to passed the test for them to enter but failed.
Ai High will teach their students how to use a gun and different kinds of illegal stuff that a minor should be scared of, but again Ai High is not ordinary so as the students.