**[Book Release]** Volume 4 was released on Friday, February 25, 2022, from Overlap Novels! If you haven't caught up with volumes 1-3 yet, this is the perfect chance to dive in!

Kazuhiko Ezoe, a management consultant living a carefree bachelor life in Tokyo's Edogawa Ward, unintentionally awakens a dungeon while investigating a strange hole that appeared in his garden. Soon, dungeons begin to emerge all over the world, prompting nations to consider ways to harness their power.

However, the dungeons held a grave secret: if left unchecked, a "Great Monster Deluge" would occur in ten years, leading to the destruction of the entire world. Only the protagonist, who activated the dungeon, is aware of this impending catastrophe...

As various nations pursue their own agendas, this 40-year-old middle-aged man gathers allies and challenges the dungeons to save the world. They would later be known as "Dungeon Slayers (Busters)"...

※This story is a work of fiction. Any resemblance to actual persons, organizations, countries, places, or other entities is purely coincidental.