Ordinary man Jasper Frost graduates from a mysterious school and is assigned as host boss in the Rule-Bound Horror Dungeon world. He, an ordinary human with no special abilities, must command Wraith Entities. He must never reveal his human identity, or he will be erased. To survive, Jasper Frost acts as a powerful being, keeping subordinates in line and navigating human players. This leads to hilarious incidents and a ridiculous career.