It's been 2 years since zombie apocalypse has started by some unknown virus, people were infected and turning into the zombies

class-A were locked in the basement for hope that they will survive

Deku: this is way worst! I don't wanna die

Uraraka: and I don't wanna get bitten!!

Bakugo: WILL YOU TWO SHUT UP?!

minwhile aizawa is trying to calm everyone down