Ore ga Isekai Danjonda! - Tensei Shitara Karada ga Danjonto Kashiteita (Associated Names)

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…