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- In the beginning, Ch.1, Myeong-il arrives, transferred from his old prison to Ochon prison. You can see that he has his old prison number on his uniform 7903 before putting on his new one with the number 1420.

- On the right of his uniform the room number was prison room 8, the first room he was put in, and is later changed to prison room 2 as he moves in with Jingi and Heonjae at Ch.7. (An obvious and important detail to change, but still appreciate the effort for continuity). (But it did error once in a panel though, and it said room 4 instead of 8 on his shirt).

- In Ch.27, when Jingi explains how deep Myeong-il's gambling addiction lies subconsciously as he shows playing cards Myeong-il drew, and you can actually see him drawing it back in Ch.21.

- The logs for Jingi and Heonjae are dated very specifically in Ch.24. From the current date (February 2008) then going as far back as Myeong-il could read (July 2000).

- Guard Lee is the designated guard that mostly does everything for and against Jingi and Heonjae, inlcuding bringing items, keeping track of their logs, and disposing the letters sent to Jingi.