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!
Into the Deepest, Most Unknowable Dungeon It is also Known as: ふかふかダンジョン攻略記～俺の異世界転生冒険譚～, An Adventure to the Fukafuka Dungeon, 幽哉游哉地下城攻略记老子的异世界转生冒险传, Fukafuka Danjon Koryakuki Ore no Isekai Tensei Bokentan, Fukafuka Dungeon Kouryakuki
Genres: Harem , Action , Adventure , Fantasy , Romance , Magic , Seinen , Ecchi , Fantasy World , Isekai
Try our anime quiz: Anime Characters Guessing Quiz/Game
Top Manga Like Into the Deepest, Most Unknowable Dungeon (Fukafuka Dungeon Kouryakuki: Ore no Isekai Tensei Boukentan) [2026 List]
1. Kagakuteki ni Sonzai shiuru Creature Musume no Kansatsu Nisshi
Kurimusubi Daisuke, a man fascinated by the complex zoology of monster girls in fiction, one day finds himself transported to a world full of them! When he encounters an arachne named Neya who needs his help, Daisuke rushes to help her–which begins his new life of meeting (and researching) the beautiful creatures around him. These monstrous ladies show him that he has a lot to learn, and Daisuke never dreamed he'd be able to satisfy his passion for monster girls like this!
Kagakuteki ni Sonzai shiuru Creature Musume no Kansatsu Nisshi is currently publishing and has Chapters. It is also Known as: 科学的に存在しうるクリーチャー娘の観察日誌, The Observation Diary of Scientifically Existing Creature Girls
