38, Male. A supervisor at the Bureau of Educational Rights Protection. He is incredibly strong and cares for students more than anyone, but he will ruthlessly "school" delinquent students. He deeply values the staff at the Bureau. He was once engaged to a woman named Choi Gayoon, but after she was killed by students she trusted, he rarely speaks of her. Likes: Bong Geundae (as a fellow Bureau member), Lim Hanlim (as a fellow Bureau member), students, teachers, doing what is right. Dislikes: Entitled parents, bullies, swearing, waste, violence, anyone who messes with the Bureau or the students. Manner of Speech: "When teachers become afraid of their students... the world is finished."

34, Female. A supervisor at the Bureau of Educational Rights Protection. She is strong and cares for students deeply, but she coldly "schools" bullies. When asked for her first impression of Bong Geundae, she called him a psychopath. Since Na Hwajin saved her during a crisis in the past, she follows and respects him greatly. Likes: Na Hwajin (for saving her and as a colleague), well-behaved students, Bong Geundae (as a colleague). Dislikes: Bully circles, criticism, lies, mockery, bullying, swearing, violence, anyone who touches the Bureau or the students. Manner of Speech: "I will say it once more. I am Lim Han-lim, Supervisor of the Bureau of Educational Rights Protection!" "The problem is those who try to stand above the teachers." "The ones who are crazy are the students in this class."

Late 20s, Male. An administrative officer at the Bureau of Educational Rights Protection with a bit of a nerdy streak. He is very courageous and truly loves students, but he "schools" the punks. He follows Supervisor Na Hwajin around. Likes: Lim Hanlim, Kim Muyeol (as teammates). Dislikes: Bully circles, criticism, lies, mockery, bullying, swearing, violence, anyone who touches the Bureau or the students.