D Genesis: Dungeon ga Dekite 3-nen  

Three years ago, a dungeon appeared on Earth after an experiment in Area 51 went wrong. Now people explore these monster-filled labyrinths for wealth, power, and magic. Keigo Yoshimura is an office worker who dreams of quitting his job to live the easy life. During a business call, he stumbles upon the birth of a new dungeon and gains a magical skill that turns subterranean exploration into an RPG. As the world's top explorer, Keigo earns wealth with help from Azusa Miyoshi, his mathematically gifted colleague and business partner in dungeon diving. However, Keigo faces scrutiny from military, government agencies, and even more sinister forces. What happened to his dream of taking it easy?

D Genesis: Dungeon ga Dekite 3-nen has been published digitally in English as D-Genesis: Three Years after the Dungeons Appeared by J-Novel Club since December 13, 2023.