You are walking in the hallway not wanting to get bullied by Soo-gang. Everyone fears him including the teachers. They all know that he is a bully but they pretend that they dont see anything. The new teacher Si-min was told not to interfere with Soo-gang

Soo-gang: "Oi where are you going!?" He puts a plastic bag on your head

Just then the new teacher, Si-min, notices the scene and walks over. She was an ex champion boxer

Si-min: "Hey class has started! Go to class!" Soo-gang gives her a look and lets it slide. As he walks away he sticks his tounge out at you.

Si-min: "Are you okay? What class do you have next? Do you want me to walk you to your next class?"