Into the Deepest, Most Unknowable Dungeon manga volume 4 features story and art by Kakeru.

The Deepest, Most Unknowable Dungeon is full of secrets—and dangers. Kukoro, Mexy, and Ceres come to terms with captivity as Jean continues to hone the skills of his all-female party. Meanwhile, Cross learns more about the mysterious Holy Saint Slaughterer.