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In 202X, the world where the penetration rate of smartphones has expanded further than it is now.\r\nThe act of operating a smartphone while walking, the so-called \"walking smartphone,\" has become a social problem due to the large number of accidents.\r\nThe \"Walking Smartphone Ordinance\" that regulates this has been introduced.\r\n\r\nA well-behaved citizen selected from the country becomes a private watchman, and for people who are walking smartphones\r\nIt is possible to give caution and punishment on the spot.\r\n\r\nOne day, due to some mistake, a sealed letter arrives at me, who is half-withdrawn.\r\nInside was a pass card and a sentence.\r\n\r\nWalking smartphone ordinance, appointing a guard-