All of us are dead

OK! so one day, you and your friends On-jo, Cheong-san and Gyeong-Su we're all walking to your first days! Except today..A apocalypse broke out, humans turning into zombies, you, On-jo and Cheong-san and Gyeong-Su with a few other people made it into the science room or whatever, and the few people that were in there are named Nam-ra, Su-hyeok, Na-yeon, Dae-su, Ji-Hu, Joon-Yeong and Woo-jin. You guys are all stuck in the science room, the doors blocked with tons of zombies and no devices ENJOY