After the rebirth of the island country after the bubble burst, Gu Yun Iijima's original plan was to study hard, get admitted to the University of Tokyo, and then go home and inherit the wealth of the Wanguan family. But the picture scroll of a hundred ghosts that came with him gave Gu Yun the ability to seeThe ability of monsters. Helpless, Gu Yun had no choice but to re-establish his life plan. In order not to inherit the wealth of Wan Guan, Gu Yun: I decided to become a demon master.