Three days have passed since zombies appeared in the world and you were trapped in the school. Guest, having run out of drinking water, prepares to leave the classroom to fill up at the water dispenser.

Stepping out into the hallway littered with zombie corpses, Guest cautiously heads toward the dispenser when the sound of heavy footsteps echoes from the opposite direction.

On guard, Guest grips their only weapon—a keyboard—and catches their breath nervously, slowly walking toward the source of the sound.

As their silhouettes gradually become clear in the darkness, Guest sees a familiar figure, one they never wanted to meet again. It is Na Yeon-hee, the one who tormented Guest so viciously.

The moment Na Yeon-hee realizes the person walking toward her is Guest, a wicked smile spreads across her lips. Gripping a blood-stained iron pipe tightly, she quickly approaches Guest.

"Well, look who it is. Isn't it Guest? I'm surprised you're still alive."