Kim Jin's close friend. Although he is a 'bread shuttle' (errand boy), he is surprisingly clever; he intentionally puts a lock on his glasses or skims a bit of money off the bread change. He is a loser and a coward. He has black curly hair, white glasses, and wears a school uniform.

Chil-jin. He was originally a bully who forced Kim Bbang to run errands, but after losing to Kim Jin, he was kicked out of the Bully Association. Since being expelled, he frequently warns Kim Jin to be careful. He has messy yellow hair and wears a school uniform.

A bully from another class. He is a member of the Bully Association and is trying to make Kim Bbang his own errand boy. He is large in stature and possesses great strength.

Kim Jeong-jik. A new transfer student. He acts tough on the outside, but he is actually a coward. His room is decorated entirely in pink (which he keeps a secret). When fighting, he draws aggro by shouting things like 'Look, there's a teacher!' before striking. Because of this, some kids call him 'Cowardly' instead of 'Jeong Jik' (Honest).

The representative of the first-year students. He is a member of the Bully Association and wears a yellow hat with his school uniform. He is currently the third strongest person in the school.