"Marking" is to scan "Kakehashi Memory" and memorize information such as products and places to the smartphone.
The QR code printed with "Kakehashi-kun" is a marker.
When you scan ”Kakehashi Memory, you will see "Marking?" if you select "Marking", you will remember in the area called "My Memory" one after another.
Scanning "Kakehashi Memory", you can quickly memorize the information or products you like and always browse and purchase them later.