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Into the Deepest, Most Unknowable Dungeon Manga #1

Into the Deepest, Most Unknowable Dungeon Vol. 1

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In this Mature-rated take on the popular isekai fantasy genre, a man journeys into the darkest, squishiest depths of a goblin-filled dungeon in another world!

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!

178 pages, Paperback

First published March 10, 2020

5 people are currently reading
34 people want to read

About the author

KAKERU

137 books6 followers

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5 stars
15 (25%)
4 stars
12 (20%)
3 stars
16 (27%)
2 stars
7 (12%)
1 star
8 (13%)
Displaying 1 - 10 of 10 reviews
Profile Image for Charles Carpenter.
8 reviews1 follower
January 18, 2023
I tend to like dirtier manga, but this one was just way too much. Women are literally objects for men's satisfaction in this book. It's like a Japanese Andrew Tate wrote it.
Profile Image for Steven Matthews.
3 reviews1 follower
February 27, 2022
I'm a fan of goblin slayer and this isn't exactly the same but is why I'm here. The indepth items on swords and advantages is quite something. The world building is interesting and what I expected given its adult nature.
Profile Image for Fan of fanservice.
289 reviews13 followers
May 20, 2024
Wow! Super impressed with this high epic fantasy isekai harem thriller! The author is adamant about not making anything OP like in the usual tropes in anime. So much detail to everything, oh my god! The lore, background information on weapons and techniques was a great way to make this environment seem real and dangerous. They have an interesting way of categorizing adventurers ranks and especially how females are categorized. The art style is pretty damn unique and I can’t get enough of it, reminds me of Berserk in that way with the medieval look to armor and atmosphere. Some of the monsters have breasts and are nude so that can give you an idea of nudity for this series; although not overkill if that’s not your jive. The harem aspect is slow burn but definitely will get hot and heavy because of how the party distinctly needs females to alleviate stress from the grueling darkness. (The women sometimes are literally just for sex in some cases)

Volume 2 looks like it will be very interesting and I need to have it!
Profile Image for Jao Wonders.
267 reviews20 followers
July 20, 2023
Despite my issues with the narration, the story itself had potential. The concept is intriguing but unfortunately the excessive exposition takes away from the excitement and tension of the plot.

I found myself more interested in the world-building and the unique creatures that inhabit it than the actual storyline. The author's creativity in creating this fantastical world is commendable but I wish more focus was placed on developing the characters and driving the plot forward.

Overall while I had some reservations about the excessive narration and slow pace I still appreciated the art style and the potential of the story. With some adjustments to the writing, this manga could become a captivating and thrilling read.
Profile Image for Michael Cool.
Author 6 books5 followers
August 28, 2025
This story at the heart had a lot of good things going for it but it became drowned in its own need to be graphic. The writer could have gotten rid of 80% of the unnecessary sexual content and still had a very adult book. It's actually a shame that the priority seemed to be adult content over story as if I were watching some late-night D list movie on Cinemax on the weekend. If you're looking for a story, then skip this one. If you're looking for gratuitous adult content, then this might be up your alley
Profile Image for Victoria Kitty.
649 reviews1 follower
March 8, 2023
The story concept is interesting, the art style is very pretty. The characters are a bit lack luster and on occasion I mistook one character for another. The only real issue I have with this manga is its super wordsy. I found myself being bogged down by the amount of reading on one page. I feel like this would have been better as a novel.
Profile Image for RealBonkers.
5 reviews
December 31, 2025
Its fine. The world is very interesting, the h-scenes are hot enough to keep you reading. Way too much exposition dumping but it’s bearable if you just skim through it. The characters are very generic especially the mc. Katana and Nal basically look the same also.

Overall if your interested in just a nice semi-horny time with cool art then yeah this is a good book
Profile Image for Adriane.
53 reviews2 followers
November 27, 2022
The story is ok and artstyle is ok but old fashion anime type of style. I can't tell if they are blushing or expressing some other type of emotion on certain panels.
Profile Image for Mina ☾.
572 reviews229 followers
February 1, 2024
A 4 stars cause it is almost impossible to me give manga below 4 stars but please note that it is not so good. Just go pick another read.
16 reviews1 follower
May 28, 2025
Quite possibly the most misogynistic piece of trash I've ever read. Kind of expected it since KAKERU started to use Monster Girls as a place to philosophise about where women in belong in society (spoiler: it's under men) but this one just starts with that rather than leading up to those ideas after 4 volumes. In this world the only way women can explore dungeons is if they tag along with male teams and accept the duty of housewife and sex object. Gross.
This entire review has been hidden because of spoilers.
Displaying 1 - 10 of 10 reviews

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