Listener ni Damasarete Dungeon no Sai Kasou kara Dasshutsu RTA suru Koto ni Natta

A dungeon explorer, or dungeon tuber, is a person who explores dungeons while streaming. On his first day of broadcasting, a rookie dungeon tuber, Sekai Kotoba, is accidentally transported to the lowest level of the dungeon, which he has not yet explored. The bottom level is a sea of lava, and he is suddenly doomed!