The author is currently rewriting this story starting from chapter 2 so please wait to read this later as Haru the translator is currently reviewing the changes the author made and will be editing his/her own translations so that's they match the new versions. While on his way to work, white collar worker Shoutarou Sagami got hit by a truck and died. And then, he was reincarnated–into a dungeon. Whatever fate it was that caused Shoutarou Sagami’s body to become a dungeon, he decided to cultivate himself as a dungeon. A story where a guy reincarnated with the body of a dungeon decides to advance of his own will. He starts as just a cave, and aims to become a gigantic labyrinth. But before he can get that far, he shelters a lost Elf, supports the cat-eared merchants in front of his entrance, and much more. Original Web Novel