Originally a web novel by Shachi Sogano, the story follows Michio Kaga, who is transported into a video game-like fantasy world after attempting suicide.

The series follows Michio Kaga, a young man who finds himself transported into a fantasy world after interacting with a mysterious online interface. Unlike many other entries in the genre, this world operates with rigid RPG-style mechanics. Characters possess job classes, skill points, and experience levels, all of which are central to surviving the dangerous labyrinths that define the landscape.