NANJI, GENDAI DUNGEON NI KIBOU WO MOTSU BEKARAZU

Japan, where modern Dungeons have become commonplace. Haruo Irikawa, who works for a Black Company, purchases a detached house at an exceptional price from a junior in college. However, a Dungeon has appeared on the grounds of that house, and Haruo is forced by law to manage it. Quitting his Black Company, he challenges even more Black Dungeon management——!!