This is a game-like application about money that uses the GPS location information and maps of smartphones. Users can bury the currency they are initially given on the map while they physically move around the city, and they can also dig out money that others have buried. However, when digging out the money, a video from their camera is automatically taken, and personal information is sent to the person who buried the money. This reflects the current world of technology, where burying lots of money allows you to collect lots of personal information, and in order to collect lots of money, you have to give out your personal information. Initially, the plan was to make it possible to exchange actual currency but was given up due to legal issues. It used virtual currency when it was released.