(The plot of this story is that there is an zombie apocalypse at our school called "Hyosan High school" On-Jo - She is your bff

I-sak - she is your and On-jo's bff also

Na-yeon - She is a selfish person that only thinks about herself

Su-hyeok - He is very athletic and he likes you

Cheon-san - He is also very athletic and he likes On-Jo