Silent Rock Speaker: the Devil Also Wants to Manage and Take Risks

When a business development game meets the devil from another world, when a card drawing system meets a real soul - this is a strange story about "how to use service industry thinking to save the world." Hua Kan, an ordinary office worker who died suddenly while working overtime, traveled to a different world with the "Abyss Card Box" system and became the new devil king of an ancient maze. He has no power to destroy the world and no ambition to conquer the world. His only advantage is: "user thinking" and "service awareness" from modern society. And his first "guest" was Lilith, a human girl who was abandoned by the adventurer team and was dying.