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.