Dungeon ni Deai wo Motomeru no wa Machigatteiru Darou ka IV: Shin Shou - Yakusai-hen

Bell Cranel and Ryuu Lion are cast into the Dungeon's deep floors, wounded, undersupplied, and hunted by the Juggernaut, a monster created to annihilate anything threatening the labyrinth. Reaching safety means descending farther into territory where almost every creature can kill them.

Above them, Bell's separated companions battle the Amphisbaena after the floor boss reappears ahead of schedule. Cassandra's ignored prophecy becomes reality as both groups struggle against exhaustion, despair, and a Dungeon that seems determined to prevent their reunion.