≪Currently being serialized in Ultra Jump!!≫ An "otherworldly dungeon" suddenly appeared in the modern world. With the popularity of dungeon-conquering broadcasts by glamorous streamers, dungeons have become the biggest form of entertainment in the world. Meanwhile, Yamaoka Eita lives a life of a corporate slave, unrelated to this world. His only enjoyment is playing with the dungeon's monsters, slimes, who act as pets. However, the floor where Eita and the slime were playing is a level that has yet to be explored by humans, and even top streamers have a hard time reaching it──!?