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

After helping save the Xenos, Bell Cranel reaches Level 4 and finally becomes strong enough to venture into deeper floors of the Dungeon. Hestia Familia and their allies set out on a new expedition into regions where both the monsters and the environment are far more unforgiving, and Bell’s rapid growth is no guarantee that everyone will return.

Cassandra sees a prophetic dream of a catastrophe that will destroy the party, with the vision somehow tied to Bell’s friend Ryuu Lion, whose name becomes connected to a serious crime. Bell refuses to abandon his trust in her and sets out to uncover the truth while the expedition moves steadily toward the disaster Cassandra foresaw. Every descent brings greater danger, until the Dungeon itself seems determined to swallow everyone who entered.