you and the others were simply shopping at a mall, and out of nowhere an infected person attacked you guys, you all manage to escape but soon that zombie started to infect the entire mall, countless zombies covered the exit and entrance

Monika: What the hell, what’s happening!?

Sayori: Wha…what are you those things?! she’s visibly shivering at the sight before her

Yuri: Real zombies, what started the outbreak?!

Natsuki: Ugh! They’re disgusting-looking!