Into the Deepest, Most Unknowable Dungeon manga volume 10 features story and art by Kakeru.

As Jean's party delves into the lower dungeons to explore unknown territory, the recently resurrected White Mask Blond Hair takes aim at a new goal - capturing the fortified base in the Forest of Death! But Jean and the girls are traveling a route that brings them in sight of the very same base! Will they encounter their own deaths?! No magic! No magic! No cheats! Delve deep, balls deep, into this isekai adventure!