Series:

Into the Deepest, Most Unknowable Dungeon

10 primary works

Book 2

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 2
NAKED AND…PREPARED!

Surviving the Deepest, Most Unknowable Dungeon takes more than fighting skills. Jean and his all-female party are brought into the woods, stripped of everything, and start training the skills they’ll need to live through the night. But will Jean be able to secure food, water, and clothing for him and the girls…or will he succumb to the temptations of other nighttime activities?

Book 3

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 3
SHOOT TO KILL!

The Deepest, Most Unknowable Dungeon is the deadliest stretch of ground in the new world into which Jean has been reincarnated. Even the top-ranked Holy Saint Slaughterer, the Queen of Darkness, and the Bow King are unable to defeat the demihuman hordes, or conquer the dungeon. But using Earth knowledge from his former life, Jean may just be able to develop the ultimate weapon—an arrow that can pierce any armor—and change the game forever!

Book 4

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 4
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.

Book 5

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 5
There is one place that has withstood attempts by every army to conquer it - the city-sized labyrinth known as the Deepest, Most Unknowable Dungeon. But now, after dying on Earth as a young temp worker, Jean is reborn into the world with a fascination for its most infamous dungeon. With the right training and the most carefully chosen set of lustful comrades-in-arms, he may have the chance to accomplish the impossible and become a legend in a new fantasy world!

From the creator of Creature Girls: A Hands-On Field Journal in Another World.

Book 6

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 6
There is one place that has withstood attempts by every army to conquer it—the city-sized labyrinth known as the Deepest, Most Unknowable Dungeon. But now, after dying on Earth as a young temp worker, Jean is reborn into the world with a fascination for its most infamous dungeon. With the right training and the most carefully chosen set of lustful comrades-in-arms, he may have the chance to accomplish the impossible and become a legend in a new fantasy world!

From the creator of Creature Girls: A Hands-On Field Journal in Another World.

Book 7

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 7
Mere human strength is often not enough to deal with harsh and unyielding dangers - especially if you’re a woman. Yearning for a way she can distinguish herself as an adventurer, Aro devotes herself to engineering and invention, perfecting a new type of arrow the world has never before seen. Meanwhile, fresh from her encounter with Rapier, the Sword Princess Katana decides the time has come to end her adventures and return home. Deeply shaken by their fateful meeting, Rapier now seeks guidance on how to deal with her new rival...

Book 8

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 8
There is one place that has withstood attempts by every army to conquer it - the city-sized labyrinth known as the Deepest, Most Unknowable Dungeon. But now, after dying on Earth as a young temp worker, Jean is reborn into the world with a fascination for its most infamous dungeon. With the right training and the most carefully chosen set of lustful comrades-in-arms, he may have the chance to accomplish the impossible and become a legend in a new fantasy world!

Book 9

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 9
MAN VERSUS NATION

Jean and his party traverse the Untraveled Lands and make an immense discovery! Sei puts her strength to the test in a mock battle against her friends to prepare for the Holy War! In the lands of the demi-humans, the breeding pens are filling up. With no magic and no cheats, Jean has only his allies and his indomitable will—can he get strong enough, fast enough, to fight back against an entire country of monsters?!

Book 10

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 10
CROSSROADS OF DEATH!

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!

Book 11

Cover of Into the Deepest, Most Unknowable Dungeon Vol. 11
ATTACK THE HEAD!

Jean and the girls stumble upon the waterlogged remains of an ancient underground civilization...and encounter the many-headed hydra! But these are no mere beasts—more heads means more brains, and soon it is siege tactics and war between humans and cunning, nigh unkillable, monsters! No magic! No cheats! Get balls deep in this isekai adventure, where intelligence and instinct collide!