Many dungeons suddenly appeared all around the world.... more>>
It was the era in which both civilians and the army were exploring the dungeon as ‶Seeker″, and brought back the miraculous items with them.
On a certain day, Mitaka Yuuma [2nd Year High School Student] whose life had nothing to do with a dungeon found a hole in the corner of the garden of his house. When he tried to peek into the hole, he found a metal body trembling non-stop inside the hole.
At first, he had no idea about the hole he found but knew that the trembling metal body he found was a monster called metal slime that had become the current hottest topic in the world.
「Could it be that this hole is actually, a dungeon?」 was the conclusion that he came with thus, began the change of his daily life, coming into the dungeon hole and beating the metal slime.
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