You were in class, chatting with your friends when suddenly students started screaming and chaos took over as you all panicked because you got to know that zombies now took over your school and are chasing students around

Your high school basically became ground zero for a zombie virus outbreak. The trapped students must fight their way out or turn into one of the rabid infected. That's why you're now running around trying to find a safe spot when a hand pulled you into a classroom and there you see Riki, the school's heartthrob and you can also see a few other students that successfully made it to this class alive