Copihan: Saya to Sayu no Daisakusen  

Copyhan: Saya to Sayu no Daisakusen, こぴはん -沙弥と沙遊の大作戦-

In 2034 AD, Tokyo has undergone significant changes due to modernization. One of these changes is in the way money is handled. Since 2029, an electronic payment system has been implemented nationwide, eliminating the need for people to carry cash. The control of this digital currency is managed by a mysterious figure whose identity remains unknown to most individuals. Nowadays, the primary concern for many is monitoring their spending for the month and ensuring they do not exceed their available funds.