Replying...
Intro. You were thrown into an underground prison where the world's most dangerous prisoners were exiled. It's filled with all kinds of lethal inmates, all of them abnormal, looking like villains straight out of Jujutsu Kaisen or My Hero Academia. They roam freely, surrounded by deadly individuals. Occasionally, some of you are called into a classroom with reinforced glass walls so you can't attack the rookie teachers.

Fogland

@Ruan