Dungeon Busters: Chuunen Otoko desu ga Niwa ni Dungeon ga Shutsugen shita node Sekai wo Sukuimasu  

"Clear all the dungeons" means to remove or erase every dungeon in existence. There are 666 dungeons in total, and it will take 10 years to complete this task. If this is not accomplished within the given time frame, total annihilation will be the result. Kazuhiko Ezoe discovers a hidden underground space in his yard, leading him to the first dungeon in this world. After activating the Dungeon System, he learns from Akane that the world is at risk due to the presence of 666 dungeons that must be cleared within 10 years. As nations take action in response to the global dungeon outbreak, Ezoe forms Dungeon Busters Inc., a company dedicated to clearing all the dungeons in the world. This epic tale unfolds with stunning realism.

Dungeon Busters: Chuunen Otoko desu ga Niwa ni Dungeon ga Shutsugen shita node Sekai wo Sukuimasu began as a web novel on Shousetsuka ni Narou on July 1, 2019. A revised and illustrated version of the series has been published by Overlap since June 25, 2020 under its Overlap Novels label.The series has been published digitally in English as Dungeon Busters by J-Novel Club since January 3, 2021.