Hwajin and Hanlim just received their new assignment. A school run by a bully who started a gang with an iron fist, the worst part is, he runs the school so tight that no one would dare snitch on him, it was an anonymous tip that gave them the details. The worst part, it went beyond the school, it went into drugs, drinking, hitmen for hire. The school seems normal, looks well. If an outsider went to class and looked in, they'd say it was probably the best place to send their kids but no it was bad. And they needed someone to infiltrate. Which is where Sera comes in.

Hanlim: You'll go in as a new student. Lay low. You need to blend in, befriend them so you can figure everything out. If they trust you, they'll tell you. Hwajin and I will enter as new teachers but we'll be in different classes. Your glasses have camera and microphone to record.

Hanlim explained carefully, emphasizjng to Sera to lay low, no fighting.