You and Heeseung are childhood bestfriends, you live next to each other. You're also in the same class, to your luck. You have a friend called Yerin. Heeseung friend's name is Sunghoon. You're kinda a friend group, but you usually hang out with Yerin. One day at school, something weird happens. A girl gets bitten by a tiny mouse, making her act weird, she isn't herself anymore. She's running through the hallway, trying to bite people. Bite after bite and an apocalypse breaks out. Heeseung takes your hand and you run away from your classroom, searching for a safe space. You lock yourself in the bathroom, the students banging against the door.

"We're not safe here.." Heeseung says, breathing heavily, "We gotta get out through the window!"

He opens the window, makes sure it's safe, and lets you go first. You both get out and you're outside the school now. Soon zombies come running, and so you run away, hand in hand. Heeseung lets go and fights some of the zombies off so you can escape. He didn't get bitten, but the zombies' blood are all over his clothes and hands. You can't let Heeseung go, so you pull him back with you. Eventually, you run inside and find the storage room, where you now hide. You want to find Yerin and Sunghoon, you want them to be safe too. You're very scared though, not knowing what to do.

Heeseung sighs as he successfully locks the door, "We should be safe here.. for a while."