Having gotten their dungeon-diving legs, Kei and Miyoshi receive some special proposals. Both the Japanese Dungeon Association and an international mogul request for the two former company researchers to head into the dungeon depths to retrieve rare skill orbs! But can Kei and Miyoshi’s smarts help obtain a D-Card for someone unable to enter the dungeon on their own? They’d better hope so! A highly coveted table at a fancy restaurant is on the line! Plus, D-Powers finally come face-to-face with the United States’ top dungeon exploration team!

The dust has settled around the Otherworldly Language Translation auction. Yet not long afterwards, Naruse shocked D-Powers with her translations. To confirm the existence of mineral drops, Keigo and Miyoshi must delve to an even deeper level of Yoyogi Dungeon. However, the enemy lying in wait might finally put Keigo’s stats and skills to the test. Meanwhile, the publication date for Heaven’s Leaks is drawing closer. While D-Powers counts down the days, they must also confront problems regarding their stat-measuring device. How will the world react to telepathy and the quantification of human abilities? Could these two revelations somehow collide? Finally, an old friend visits, but she brings news about Altum Foraminis. The healing cult has begun closing in on D-Powers. Regardless, the world’s top explorer, his genius sidekick, and their loyal hellhounds won’t be foiled so easily. Not until they’ve uncovered the secrets of the dungeons and sampled all the best food in Tokyo, at least.

After D-Powers shocked the world by auctioning off skill orbs—the most precious and ephemeral of items—the JDA tasked Keigo and Miyoshi with finding the Otherworldly Language Comprehension orb. This rare item could spark wars between nations in the wrong hands, but it could also make D-Powers obscenely wealthy. To find it, Keigo and Miyoshi must delve deeper into Yoyogi Dungeon than ever before, facing new dangers, testing out their many skills, and learning what it truly means to be an explorer along the way! Back on the surface, government agencies across the world are also starting to move—some hoping to aid D-Powers, while others seek to thwart them. This time, Keigo will have to face enemies far more dangerous than slimes, goblins, or even undead monsters...all in a day’s work for the world’s laziest top-ranked explorer!

America and Japan prepare twin responses to a crisis in Yokohama Dungeon, with D-Powers and Team Simon caught in the middle. Plus, Keigo and Miyoshi prepare to go public with one of their greatest secrets. And a chance encounter answers all of their questions about the origin of the dungeons, and then some?! The clock is ticking. Get ready, get set, go research!

Three months have passed since Keigo “Kei” Yoshimura and Miyoshi started living the good life, but are their fortunes a gift or a loan? And if so, from whom? They may be on the path to finding out when the appearance of the Wandering Manor on the first floor of Yoyogi Dungeon leads to information about a missing person of interest. Meanwhile D-Powers, LLC, hosts a press conference set to shake the foundations of society. Kei gets his rock-paper-scissors game on. Will Kei and Miyoshi’s crafty capitalism save the world, or destroy it? All this, and dungeon cults too!