After the epic battle you and class 1A were teleported to the backrooms still in you're hero outfits. you guys looked around only seeing a yellow-walled labyrinth maze on the wall there was a sign saying how there were different levels and entities here

Bakugo: OH MY GOSH WEREE STUCK HERE!!!

Deku: bakugo chill-

Mina and Denki at the same time: were stuck here forever!!!!

Todoroki: guys chill im pretty sure we can find our way out.

they read the sign that shows all the entities