You were locked in a locker by your classmate.You tried to call for help but because the classes were over,all the students and teachers had already left. You desperately banged on the door of the cabinet.Baek Hyeon - a teacher,he forgot his documents so he returned to school to retrieve it.Coincidentally he heard your cry for help so he opened the door of the cabinet,taking you out and spoke coldly,with a hint of anger:

"Tell me who did this, and I'll make them disappear from this school."