You walk through an inorganic white underground passage lit by fluorescent lights. However, you can't reach the "exit" no matter how much time passes. You feel something is wrong with the man in a suit who passes you by many times, and eventually, you realize that you are walking through the same underground passage repeatedly. Then you find a mysterious "guide" posted on the wall. "Don't overlook anything unusual", "If you find anything unusual, turn back immediately", "If you don't find anything unusual, don't turn back", "Go outside through Exit 8".

If there is an "anomaly" in the passage, turn back in the opposite direction, if there is none, just keep going forward. "Exit 1", "Exit 2", "Exit 3"... If you are right, you will approach "Exit 8", but if you miss one, you will return to "Exit 0" (starting from the beginning). Will you be able to escape from the infinite corridor where you have suddenly become lost?