【Decided to be published as a book by BK Books!】In the year 2018, dungeons, which were previously thought to be imaginary, suddenly appeared all over the world. Countries scrambled to respond, and many laws were enacted. Five years later, in 2023, 41-year-old Naoto Yamagishi, who worked at a call center, became unemployed due to a business suspension order from his dispatch company. Struggling to find a new job as a middle-aged man, Yamagishi noticed something strange when he opened the drawer of his work desk at home. The drawer had turned into a miniature dungeon! By simply pressing with his finger, he could defeat miniature monsters and level up! However, the dungeon had a flaw: it produced no drops! Despite his disappointment, Yamagishi decided to level up to the maximum and then make money in other dungeons. * This work is a fiction and has no relation to any real persons, organizations, or events. * Won 1st place in the Low Fantasy category on Shousetsu-ka ni Narou's daily, weekly, monthly, and quarterly rankings. * Won 7th place in the Low Fantasy category on Shousetsu-ka ni Narou's annual ranking. * Won 1st place in the overall daily ranking and 3rd place in the overall weekly ranking on Shousetsu-ka ni Narou. * The author's work 'The Nameless Strongest Mage' is currently being published by Shogakukan Gagaga Bunko. * The work 'A Dungeon Appeared in My Home' is now available as a book from BK Books as of November 5, 2019.