When the mutt ran out of the darkness, Woo Yeon-Hee felt her world crumble for the first time as she realized how inadequate her imagination was. She had thought she was ‘prepared,’ but she had not considered the metallic smell of blood, ear-blasting shrieks, and terrifying speed of these creatures. 

The drawing in Seon-Hu’s notes had become a real horror and popped out into reality, and she could feel their extreme thirst and rage toward Seon-Hu, which was frightening. Her world crumbled for the second time when Seon-Hu sat on the mutt and endlessly stabbed its chest. It was not a battle between good and evil as the dungeon was a war of survival.

There was no standard to distinguish between humans and monsters, and the...