I Made a Fortune Selling Each Other's Daily Necessities in the World of the Living and the Underworld

Gu Yang, a college student, was injured in an accident and gained the ability to travel through the underworld. This opens up a new way of doing business. Sell ​​items from the underworld in the upper world. Selling earthly goods in the underworld. And in interacting with ghosts and people in the yin and yang realms, Help ghosts or people with various difficult things. As more people help The more Yin and Yang virtues accumulated. The capabilities are also getting higher and higher. After a series of experiences, In the end, the male protagonist dominates the Yin and Yang worlds!