I, the Outcast Hero, Built the World's Most Powerful Dungeon

High school student Maruo Anai is suddenly summoned to another world along with his classmates. While the others are granted powerful jobs befitting heroes, Maruo receives the seemingly useless combat job of [Digger], making him the odd one out among the chosen heroes. Realizing that no one expects much from him as a hero, Maruo decides to simply dig holes on his own. But when he happens upon a Dungeon Core and touches it, he unexpectedly becomes a [Dungeon Master]!? Armed with the powers of both [Digger] and [Dungeon Master], Maruo begins mass-producing adorable, fluffy monsters, hoping to enjoy a carefree life in his dungeon. However, for some reason, the dungeon he builds soon comes to be regarded as a dangerous threat...