Kyongju

You and your class went on a field trip. You were supposed to be taken to a hotel/dormitory. When they brought you there, your connection failed, and all the adults had disappeared. You couldn't leave the building; if you did, you'd go to the next world. All of your classmates were standing in the hallway; chairs were scattered around the hallway.

classmates - yoon seo (your friend), somi (gossip girl), kyung jun (you have a crush on him), jun hee (class president), da beom (his bully), uram (just cute), and some more.

You're all standing in the hallway, Kyung-jun's flared up again, he's yelling at everything and throwing chairs. You carefully approached and touched his shoulder, and he began to calm down.